197 Foods Dogs Can’t Eat - The Ultimate Guide

We say there is love is sharing. So it is only expected that we share everything we have with our furry babies whom we love so much, including our food right? Well, research tells us that things could get pretty awry if you decide to share your food with your pet. In fact, we have about 197 foods dogs can’t eat which we are going to look at today.

We’ve enlisted the help of top authorities in the pet care industries to compile this exhaustive list of everything you should never feed your dog. Some of these items on our list have been known to cause mild maladies in dogs, others are dangerous to the point of being fatalistic.

Although we promise to give you only verified facts in this article, we must remind you that this shouldn’t take the place of a vet consultation. So, while we will also give you tips on how to manage the situation when Fido consumes something toxic, your vet is still the number one person to reach out to should that happen.

So, without further ado, let’s begin with…

Human Foods Dogs Can’t Eat

1. Almonds

Okay, first, almonds are not necessarily toxic but they can constitute serious intestinal distress for your dog.

For one, almond is a type of nut, and so it is quite high in fats which could put your pooch at the risk of pancreatitis – a serious health condition in dogs (source).

Besides that, almonds can constitute a choking hazard especially for small breeds. Almonds could cause a form of obstruction in the intestines, esophagus, and windpipe. In fact, in some cases, such obstructions would require surgery else it could end up fatalistic.

Now, generally, you shouldn’t be worried if your dog swallows one or two almonds. However, you might want to watch him closely for any signs of obstruction or intestinal distress (source).

2. Flavored Almonds

Okay, flavored almonds present somewhat unique risks when compared to unflavored almonds. First off, flavorings and spices can cause irritations in your dog’s gut. Also, the salt contained in the seasoning can cause an unhealthy retention of water. Plus, it can also lead to salt toxicity if your dog consumes too many flavored almonds (source).

3. Chocolate

We’re sure you’ve heard it before – chocolate is bad for dogs. But why can’t dogs eat chocolate?

First, chocolate contains caffeine and theobromine which can cause an elevation in your dog’s heart rate and overstimulate their nervous system as well (source).

Now, with chocolate toxicity, the risks are usually dependent on the quantity of chocolate consumed and the type of chocolate as well. This is because concentration of these toxic substances vary from one chocolate type to another.

Some of the symptoms of chocolate poisoning include diarrhea, vomiting, restlessness, tremors, abnormal heart rate, restlessness, and seizures (source).

In fact, with seniors and dogs with cardiovascular conditions, chocolate poisoning may very well lead to sudden death (source).

4. Cinnamon

Cinnamon is not exactly toxic for dogs, just like almond. Nonetheless, this does not give you the go-ahead to splurge on cinnamon whether by sprinkling on his kibble or otherwise.

Experts warn pet owners that cinnamon can cause irritation in the stomach and skin irritation. And it’s not just for dogs, it’s for humans too.

According to authorities, anything over a teaspoon of cinnamon powder can cause problems in pets while even lower dosages of cinnamon oils are enough to do the damage.

An overdose of cinnamon can lead to diarrhea, vomiting, reduced blood sugar, liver disease, and a change in the heart rate – all of which are bad news.

As expected, it’s worse for small breeds than it is for large breeds as overdosing requires a much lower dose than it would take for a large breed (source).

5. Corn On the Cob

While corn is not exactly bad for your dog, corn on the cob is potentially dangerous for your pup. This is because of the choking risk that corn on a cob poses for your dog. If your dog should mistakenly swallow the cob, it could cause a blockage of the intestine. This is why dogs must not be allowed to gnaw on a corn cob because if he is hungry enough, he could whittle down the whole cob (source).

6. Flavored Popcorn

A few pieces of popcorn might not be so bad as long as it is neither salted nor buttered. Popcorn should be air-popped, plain, light, and as close to natural as possible to qualify as a treat for your dog.

In fact, unflavored popcorn is fiber-packed and a good source of energy for your dog.

Just ensure that there are no unpopped kennels in the batch you give him so they don’t cause stomach upset.

When popcorn is packed full of butter, salt, and other kinds of flavors, on the other hand, it automatically becomes unhealthy for your dog (source). So, ensure you keep them far away from him.

7. Garlic

Garlic contains thiosulfate – a substance that’s safe for humans but toxic to dogs (source).

Thiosulfate is known to bring about an oxidative damage of red blood cells which can result in hemolytic anemia. This condition is usually symptomized by rapid breathing, paleness of the mucus membranes, weakness, dark-colored urine, jaundice, and lethargy.

In addition, garlic toxicity is also known to cause depression, abdominal pain, dehydration, loss of appetite among others.

In truth, an accidental ingestion of a little garlic might not be enough to make you panic. However, to intentionally feed your dog with garlic can cause disaster for your pet (source).

8. Garlic Bread

With garlic bread, it’s not just the garlic, it’s the unhealthy amounts of oil, butter, herbs, and cheese that can cause stomach upset in dogs. Garlic bread really has no nutritional value for pets and, instead, supplies the body with fat and calories that are really unnecessary for them (source).

Thankfully, garlic poisoning is not fatalistic for dogs. Nonetheless, your dog would need supportive care after garlic poisoning for him to stay a little comfortable (source).

9. Ice Cream

The first problem with ice cream is that, after weaning, dog’s bodies don’t develop to be able to digest milk (source). As you know, ice cream contains milk. When consumed, the presence of milk could lead to bloating up, gas, vomiting, or diarrhea.

Besides that, ice cream is full of sugar which could easily lead to obesity in dogs as well other health issues. But even at that, even sugarless ice cream could constitute a problem if it contains sweeteners like xylitol.

Generally, small amounts of ice cream do not constitute a big nuisance. However, if your dog is currently struggling with diabetes, obesity, dairy intolerance, or allergies, even little amounts of ice cream could cause serious problems for him (source).

10. Macadamia Nuts

Macadamia nuts are a huge no-no for dogs. You should never feed your dog Macadamia nuts as they cause severe consequences such as depression, ataxia, hyperthermia, vomiting, and weakness.

Now, macadamia nuts are particularly interesting as they aren’t known to cause such consequences in humans or even cats. Researchers who have looked into the matter still have nothing to report as regards why these nuts are toxic to dogs.

In fact, it is so bad that even as little as a tenth of an ounce of macadamia nuts per 2 pounds of your dog’s body weight is enough to do damage (source). So, don’t even give your dog just a little taste.

You want to be careful as macadamia nuts are found in everyday foods such as baked goods like muffins, cakes, cookies, and trail mixes.

Sometimes, symptoms of macadamia nuts are only mild and resolve themselves in a few days. However, there are times where it gets more serious and dogs might even lose some function of their limbs.

Consult a vet immediately you suspect your dog might have ingested macadamia nuts (source).

11. Onions

Never feed your dog onions. They contain N-propyl disulfide which is quite toxic to dogs and can damage their red blood cells (source).

In turn, this affects the transportation of oxygen round the body which leads to anemia. And, if severe, anemia might even demand that your dog gets a blood transfusion.

Please, note that all parts and all forms of onions are dangerous to dogs. From the leaves to the juice, to the processed powders, onions are toxic to dogs. So, be careful about that (source).

12. Nutmeg

Nutmeg contains a substance known as myristicin which is known to be toxic to dogs especially when consumed in large amounts (source).

Some of the symptoms that follow an overdose of nutmeg in dogs include an increased heart rate, dry mouth, high blood pressure, stomach upsets, as well as seizures.

You want to ensure that you keep nutmeg out of the reach of your dog. Plus, also avoid giving him baked goods or any other kind of food that contains nutmeg (source).

13. Raw Yeast Dough

Here’s why it is unsafe for dogs to consume raw yeast dough. Yeast ferments, and when it does, it produces alcohol. This, therefore, can lead to alcohol poisoning and even death if your dog consumes it (source).

Besides that, consuming raw yeast dough could lead to bloating in dogs. This is as a result of the dough rising or expanding in their stomach. This could eventually lead to weakness and a difficulty in breathing (source).

14. Artificial Sweetener (Xylitol)

It’s cool to go on a sugar-free spree as humans. As a replacement for sugar, oftentimes, manufacturers use an artificial sweetener known as xylitol which causes a release of insulin in the body.

For dogs, consuming xylitol is really dangerous as it could lead to hypoglycemia. This is, in turn, linked to liver failure as well as blood clotting disorders.

Xylitol is found in candy, toothpaste, gum, some diet foods, as well as baked goods. So, make sure your dog does not get his paws on any of these items (source).

15. Salt and Salty Snacks or Foods

Salt isn’t completely unsafe for dogs. However, when consumed in large quantities, excessive salt consumption can lead to excessive thirst as well as frequent urination. In some dogs, excessive salt consumption can also cause sodium ion poisoning (source).

How to know your dog might have consumed too much salt? Symptoms usually range from vomiting to depression to diarrhea, increased body temperature, tremors, as well as death.

Therefore, for your dog’s sake, avoid feeding him salty snacks such as pretzels, potato chips, or salted popcorn.

16. Walnuts

Just like macadamia nuts, walnuts are dangerous for dogs (source).

17. Pecans

In large amounts, pecans can become toxic to dogs as they contain a toxic compound known as juglone. Although juglone is more toxic for dogs, it still presents mild symptoms for dogs. When consumed in large amounts, pecan can lead to a mild stomach upset as well as an obstruction of the gut (source).

18. Sugar

Just like in humans, sugar can cause your dog to gain unnecessary weight which could eventually lead to obesity and diabetes. Also, sugary foods can easily cause tooth decay and other related conditions in your dog (source).

19. Fried and Fatty Foods

The problem with fatty foods is their propensity to cause pancreatitis in dogs. Generally, a small helping of fatty foods might not cause a lot of damage. However, if fed these on a consistent basis, pancreatitis could follow which can easily become life-threatening for your dog (source).

20. Cooked Bones

This seems like a very natural thing to do. However, cooked bones are unbelievably dangerous for dogs. This is because when bones are cooked, they become more brittle. This leads them to splinter easily into sharp shards. When these pass through a dog’s digestive system, they can cause some damage, either by blocking the gut or by cutting it (source).

21. Guacamole

As you know, guacamole is made mostly from avocados which contains poison that is dangerous for dogs (source).

Besides that, guacamole also contains other toxic foods like garlic and onions which are known to cause gastrointestinal upsets as well as anemia. So, please do not feed your dog guacamole.

22. Snack Mix

For humans, snack mix can be a wonderful treat. So, it’s not so far-fetched to want to give your dog a handful or two of this treat. Problem is that, oftentimes, this snack mix contains garlic and onion powder and we’ve already established these to be highly problematic for dogs.

Also, snack mix is high in sodium and is quite salty. This could lead to sodium poisoning in dogs as well as excessive thirst and frequent urination (source).

23. Pasta Sauce

Generally, pasta is good for you as long as it is plain and cooked. And since we are here, please keep in mind that some dogs are allergic to wheat. If your dog is, he shouldn’t be eating pasta as it is made of wheat.

Now, pasta sauce. This contains a number of spices that are generally toxic to dogs including garlic and onions. They are also high in salt and might contain tomatine which is dangerous to dogs (source).

24. Pepperoni

Pepperoni contains unhealthy levels of fat and sodium which are both bad for dogs. Besides, they also contain some unsafe seasonings for dogs.

Regular consumption of pepperoni, therefore, can lead to problems with digestion, kidney damage, pancreatitis, or salt poisoning.

You might want to watch out for symptoms like excessive thirst and urination, abdominal upset, diarrhea, and vomiting if your dog has just consumed more than just a few slices of pepperoni (source).

25. Pistachios

We’d say to be careful with these because they are high in fat as most nuts are. Remember to deshell first before serving. Also, be extra careful with smaller breeds as they could cause digestive issues or constitute a choking hazard (source).

26. Cashews

Because, most times, cashews are salted, it is a food to be wary of. It’s best to limit feeding your dog cashew to occasionally and only in small quantities at a time.

Plus, it cashews are high in fat and, if fed to your dog on a regular basis, it could lead to obesity as well as pancreatitis (source).

27. Baby Food

Sometimes, even your vet might recommend that you feed your pooch baby food. Especially if said puppy is sick. Nonetheless, if you’re going to feed your dog baby food, please check first to see if the food contains onion powder. We already know that is toxic or dogs (source).

But besides that, putting your dog on a baby food diet is a bad idea as it will, eventually, lead to nutritional deficiencies in the dog. So, for healthy hounds, there’s no need to feed baby food. Feed puppy food instead (source).

Foods Dogs Can’t Eat — Fruits and Vegetables

1. Avocados

Although a trendy healthy food alternative for humans, avocados are dangerous for dogs. This is because they contain persin.

Persin is a fungicidal toxin which is known to cause severe health issues in dogs. Sometimes even, persin can cause death in dogs and other animals.

Now, the exact lethal dose of persin is yet unknown. However, we do know that when consumed in large amounts, persin can cause diarrhea and vomiting. It could also cause myocardial damage, and because it is high in fat, can also lead to pancreatitis.

Even though the fleshy part of avocado contains only little persin, compared to the skin, pit, and leaves, the level of persin in avocado is still a little too much for dogs. So, avoid giving your dog avocado at all (source).

2. Cherries

Why are cherries so dangerous? Well, in their stems, pits, and leaves is cyanide which is lethal if your dog consumes a high enough quantity (source).

Cyanide has the ability to disrupt the transportation of oxygen around cells which means that blood cells don’t get adequate oxygen.

Besides that, the pits can easily cause intestinal blockage if they get lodged in the gut.

One cherry fruit might not be enough to panic. However, if you suspect that your dog has had some cherries, there are symptoms to look out for. Please look out for breathing difficulties, redness of the gums, as well as dilation of the pupils as these are all indicative of food poisoning (source).

3. Grapes and Raisins

Your dog should never eat grapes or their dried siblings – raisins. Although researchers have yet to pinpoint the exact toxic substance contained in these fruits that lead to negative reactions in dogs, they are still known to be super toxic to dogs.

There’s no data either on what quantity of grapes or raisins are poisonous for dogs. Sadly, grape and raisin toxicity is actually fatalistic for dogs. It could lead to acute renal failure in dogs which can easily lead to death (source).

So, you should never feed your dog grapes or raisins, even seedless grapes and peeled grapes should be avoided.

If you suspect that your dog has consumed some grapes or raisins, you must contact a vet immediately or call the Animal Poison Control Center (source).

4. Tomatoes

Generally, tomatoes are safe for dogs, but they do come with certain levels of risks. For instance, the green parts of tomatoes contain a toxic substance known as solanine which is harmful to dogs when consumed in high quantities (source).

5. Asparagus

Well, asparagus isn’t exactly unsafe for dogs. But, at the same time, it is pointless feeding your dog asparagus and here are a few reasons why.

Firstly, raw, asparagus is way too tough for dogs to chew and digest. So, some dogs might experience gas, diarrhea, and vomiting after eating raw asparagus (source).

Also, sometimes, in a bid to make asparagus easier for dogs to chew and digest, you could overcook, at which point, all the nutrients are already lost (source).

So, raw or cooked, asparagus is mostly useless for dogs and they can do quite well without it.

6. Apricots

Just like cherries, all parts of apricots besides the flesh, contain cyanide which is lethal to dogs (source).

7. Plums

Dog owners are generally advised to not feed their dogs plums mostly because of the pit. Plums come with pits that can be a little sharp which could cause damage to the gastrointestinal tract. It’s especially risky for smaller breeds.

Besides, if the pits of plums are crushed, it could lead to a release of cyanide which we have established to be dangerous for dogs.

As for the fleshy part of plums, that is not considered to be unsafe for dogs and can be safely given to dogs. Be careful to avoid consumption of large amounts of the flesh though as they are quite high in sugar which isn’t good for dogs (source).

8. Mushroom

Wild mushrooms are highly toxic for dogs and as such you should avoid allowing your dogs eat mushrooms while on a trail. Even if you think you’re sure the mushroom is not toxic, the truth is that, sometimes, these mushrooms are hard to tell apart.

Also, contrary to what people think, dogs can’t actually tell toxic mushrooms apart by scent (source).

So, better than safe than sorry. Keep your dogs away from mushrooms.

9. Grapefruit

Grapefruit is toxic to dogs because it contains psoralens and essential oils that can do your dog some damage. Some symptoms of this damage include vomiting, diarrhea, as well as other issues (source).

10. Lemons and Limes

Well, while lemons and limes are not toxic, they are quite acidic. In the first place, they don’t even taste pleasant to dogs. Secondly, in some dogs, the acidity of the fruits can lead to vomiting, diarrhea, stomach upsets, and weakness.

Also, if your dog consumes a large piece of lemon peel, it could go ahead to block his intestine, and, of course, that’s something we don’t want.

Besides, there are no real, appreciable health benefits of feeding dogs with lemons (source). So, why bother?

11. Raw Potatoes

During growth or storage (after harvesting), the green sprouts and skins of potatoes tend to develop solanum alkaloids after being exposed to sunlight for a while. While this is quite dangerous, solanine poisoning in dogs is quite rare due to a few reasons.

One reason is that solanine is poorly absorbed in dogs, and most times, gets hydrolyzed to solanidinel which is not as toxic as solanine. Solanidinel is then quickly eliminated (source).

Nonetheless, though rare, they have still been reports of solanine poisoning in dogs, so err on the side of caution and only feed your dog cooked or mashed potatoes (source).

Foods Dogs Can’t Eat — Drinks

1. Milk

Well, milk is not a totally bad idea. However, the problem exists when the dog in question is lactose intolerant, and many dogs are actually lactose intolerant, especially puppies. In fact, in most dogs, after weaning, the dog loses the ability to digest milk. So, you want to be careful.

Occasionally, you can give your dog a few tablespoons of milk as a treat. However, this shouldn’t be a regular thing as milk contains a good concentration of fat and natural sugars which are bad for dogs. This is because it has the potency to cause obesity and pancreatitis in dogs (source).

2. Alcohol

While some people think it is funny to see their dog inebriated, there’s actually nothing to laugh about when it comes to alcohol consumption in dogs. Alcohol is poisonous to dogs.

When consumed, alcohol can lead to vomiting and diarrhea, a decrease in coordinating ability, depression, difficulty in breathing, an increase in blood acidity, and, in extreme cases, even coma and sometimes death (source).

3. Coffee

Your fresh cuppa is not a good idea for your pup. In fact, it is dangerous for your dog because of its caffeine content. Did you know that there are some dogs that are more sensitive to caffeine than humans are (source)?

Actually, caffeine contains methylxanthine which, although is good for humans, is not as good for dogs. When consumed in large amounts, caffeine can lead to diarrhea, vomiting, a racing heart, hyperactivity, panting, tremors, seizure, increased thirst and urination, or even death (source).

4. Tea

Tea can also contain caffeine sometimes which can be harmful to pets even in small doses. So, in everyone’s best interests, keep your pup away from tea (source).

5. Soda

Soda could also contain caffeine too. Lapping up a small poodle of spilled cola might not be a big deal. However, it’s definitely not a great idea to fill your pup’s bowl with soda as a treat (source).

6. Fruit and Vegetable Juice

While many fruits and veggies are good for dogs, there are some that are not as good. Fruit and vegetable juices to stay away from include juices from grapes, avocados, and raisins (source).

7. Sports Drinks

Many dog owners exercise with their dogs which is a great idea. Nonetheless, while you can recharge with a swig of energy-boosting drinks, this is a dangerous move for your dog.

Sports drinks are usually packed full of electrolytes, extra sodium, as well as vitamins which your dog does not need, generally (source). But then again, veterinarians do recommend sports drinks sometimes to prevent dehydration.

However, generally, the best idea is to consult with your vet first before deciding to give them any form of sports drinks.

8. Coconut Milk and Water

Alright, so experts are divided on this issue. One party says it is safe for dogs, the other says it should only be given in small amounts. The main problem with coconut water as stated is that it has a high concentration of potassium which is bad for dogs (source).

Foods Dogs Can’t Eat — Plants

1. Sago Palm

All the parts of this plant are very poisonous to companion animals, and, of course, you know dogs are companion animals. Especially in the seeds of the plants, there are large doses of toxin which can be lethal to dogs.

In fact, ingestion of just a couple of seeds are enough to cause serious symptoms such as diarrhea, vomiting, seizures, depression, and even liver failure (source).

2. Tulip/Narcissus Bulbs

The bulbs of the tulip contain toxins which have been proven to irritate the gut and cause drooling, a drop in appetite, depression of the central nervous system, cardiac abnormalities and convulsions (source).

3. Azalea/Rhododendron

Grayantoxins are toxins found in this plant which cause symptoms such as drooling, diarrhea, vomiting, weakness, and depression of the central nervous system.

In severe cases, azalea poisoning can even lead to coma or death as a result of cardiovascular collapse (source).

4. Oleander

Just like the sago palm, all parts of oleander are considered toxic, containing cardiac glycosides. These glycosides have the ability to cause an irritation of the gut, hypothermia, abnormal cardiac function, and even death in extreme cases (source).

5. Castor Bean

Castor bean contains ricin which is a highly poisonous toxin. When ingested, ricin can cause severe pains in the abdomen, drooling, diarrhea, vomiting, increased thirst, loss of appetite, and weakness.

In severe cases, symptoms might aggravate to dehydration, tremors, muscle twitching, seizures, coma, and, sometimes, death (source).

6. Cyclamen

Cyclamine, a toxin found in cyclamen is a known cause of considerable irritation of the gut, and serious vomiting. Although this toxin is concentrated in the roots of the cyclamen, other parts also contain the toxin and, in some cases, fatalities have been reported (source).

7. Kalanchoe

Toxins in kalanchoe can affect the heart’s rhythm and rate and can also cause gastrointestinal irritation as well (source).

8. Yew

Yew contains taxine which can affect the central nervous system causing symptoms such as difficulty with coordination, trembling, as well as breathing difficulties (source).

In some extreme cases, taxine can also cause an irritation of the intestines and heart failure which can easily lead to death (source).

9. Amaryllis

Be extra careful if you’re one to adorn your house with amaryllis during Easter as it is dangerous for your dog. Amaryllis is known to contain some toxins which can cause diarrhea, vomiting, pain in the gut, hypersalivation, depression, tremors, and anorexia (source).

10. Autumn Crocus

Another dangerous plant, autumn crocus can lead to oral irritation, vomiting (with blood), diarrhea, multiple-organ damage, as well as suppression of the bone marrow (source).

11. Chrysanthemum

Very popular. Very dangerous. Chrysanthemum contains pyrethrins, and if ingested, pyrethrins can cause stomach upset which may present as drooling, diarrhea, and vomiting.

There are also cases where ingestion of the toxin has led to depression as well as loss of coordinating ability. This is especially so if your dog consumes enough of the plant (source).

12. English Ivy

Going by all kinds of other names including “sweetheart Ivy,” there’s nothing sweet about this plant. It contains triterpenoid saponins which cause gastrointestinal problems symptomized by hypersalivation, abdominal pain, vomiting, and diarrhea (source)

By the way, Ivy foliage is more toxic than its berries. But even though it’s highly unlikely that your dog would approach Ivy foliage and begin to munch away, then again, it’s always better to err on the side of caution.

13. Peace Lily

Peace Lily contains calcium oxalate crystals which mostly irritate the mouth. These crystals cause an irritation of the mouth which eventually leads to excessive drooling, difficulty in swallowing, vomiting, an intense burning in the mouth, tongue, and lips of the pet as well (source).

14. Pothos

Pothos is a really common household plant – both the Epipremnum and the Scindapsus. When ingested by dogs, toxins in pothos can cause irritation and swelling in the oral tissues. It could also lead to swelling of the gastrointestinal tract as well (source).

15. Schefflera

Just like Peace Lily, Scheffelera contains calcium oxalate crystals. For symptoms these crystals cause, see Peace Lily, if you skipped it (source).

16. Poinsettias

When ingested, these ones mostly affect the mucus-membrane by irritating the membrane. Thankfully, they aren’t too dangerous as long as you treat the matter promptly and properly (source).

17. Karaka Tree Berries

This one is particular to New Zealand. These berries look like delicious fruits as they turn orange when they ripen. However, if eaten by your dog, it can turn fatalistic.

Karaka tree berries contain an alkaloid – karakin which is highly toxic. When ingested, karaka berry poisoning is symptomized by convulsions, weakness, confusions, and vomiting.

Symptoms of karaka berry poisoning are usually delayed by about 24 to 48 hours. So, if you think your dog has had even one, kindly see your vet immediately.

Also, experts warn that these berries remain poisonous for a very long time. So, even if it’s a berry from the previous season, it’s possible for it to still be toxic to the consumer (source).

18. Aloe Vera

Aloe Vera is another common plant grown in many households especially for treating burns. However, it is not something you want your dog to ingest, so keep it out of their reach. Symptoms of Aloe Vera poisoning include vomiting, diarrhea, a change in the color of the urine, tremors, and anorexia (source).

19. Baby’s Breath

As innocent as this plant sounds, Baby’s Breath is a real bad boy. If ingested, this flower can cause diarrhea and vomiting in dogs (source).

20. Begonia

Another popular garden plant, Begonia is known to be toxic to dogs especially the tubers. Symptoms of Begonia poisoning include an irritation of the oral cavity, intense burning in the mouth, lips, and tongue, excessive drooling, swallowing difficulty, and vomiting (source).

21. Carnations

Although not as poisonous as the other flowers on our list, carnations are common in floral arrangements and can cause mild symptoms. These can range from mild gastrointestinal upset to a mild case of dermatitis (source).

22. Daffodil

Daffodils, especially at the bulbs, are super toxic to dogs. Symptoms of this toxicity include vomiting, diarrhea, salivation, convulsions, decreased blood pressure, cardiac arrhythmias, and tremors (source).

23. Gladiola

Usually, the bulb of the gladiola is the toxic part of this flower. So, generally, it might not be as dangerous as some other plants. Nonetheless, better safe than sorry. Symptoms of poisoning by gladiola corms include salivation, drooling, diarrhea, lethargy, and vomiting (source).

24. Hosta

Dogs are, naturally, not attracted to Hostas but still, you want to be careful. Some dogs can be really inquisitive. Hostas are toxic to pets and can lead to depression, diarrhea, and vomiting (source).

25. Milkweed

Milkweed is wonderful to have in your garden especially because of the monarch butterflies. Nonetheless, milkweed is quite toxic, and you should know (source).

When consumed, milkweed poisoning can cause multiple symptoms, all of them bad. They include vomiting, weakness, severe depression, anorexia, diarrhea. Sometimes, these are then followed by a rapid and weak pulse, seizures, breathing difficulties, dilation of the pupils, failure of the liver or kidney, paralysis of the respiratory tract, and finally, even death (source).

26. Morning Glory

This one causes hallucinations in dogs that consume them among other symptoms. These symptoms include gastrointestinal upset, tremors, agitation, ataxia, disorientation, and anorexia (source).

27. Tomato Plant

Dogs must not eat the tomato plant, or certain parts of the tomato fruit either. Although not lethal, it could still cause a significant level of discomfort for your little pooch (source).

Symptoms of poisoning include hypersalivation, loss of appetite, intense gastrointestinal trouble, drowsiness, diarrhea, depression of the central nervous system, change in behavior, confusion, weakness, dilation of the pupils, as well as a decrease in heart rate (source).

28. Holly Berries

Of course Holly Berries remind you of one thing only – Christmas! With their typical green leaves and red berries, holly berries can look really enticing. However, when consumed by dogs, they can cause diarrhea, vomiting, stupor, and dermatitis.

Luckily, effects are often mild since the berries are so bitter, dogs don’t, typically, consume them in large quantities (source).

29. Mistletoe

Doesn’t thinking of a mistletoe just make you smile? Well, you probably didn’t know but eating even a few berries can cause diarrhea, vomiting, as well as moderate levels of intestinal and stomach pain in dogs.

If severe, symptoms might progress to labored breathing, reduced blood pressure, and cardiac failure. So, always ensure that the mistletoe is hung high enough to be out of the reach of your pet (source).

30. Dumbcane

With its vibrant color, dumbcane is a good idea when you want to liven your living space a little bit. However, dumbcane is quite dangerous to pets. Especially if your dog loves to chow down on foliage, you’d have to be extra careful about this one.

Symptoms of poisoning usually include inflammation and injury to the lips, tongue, and throat. In some cases, blindness might also result as well as respiratory trouble. Excessive drooling, difficulty in swallowing and vomiting are other symptoms (source).

In fact, many dogs often require hospitalization after eating dumb cane. It’s that bad.

31. Water Hemlock

Water Hemlock is the most violently toxic plant in North America (source). The plant contains a highly toxic substance called cicutoxin. For this toxin, only tiny amounts are needed to cause unbelievable damage in the consumer. Not all parts of the water hemlock are toxic though – mostly the roots. Nonetheless, the effects of ingestion are drastic.

Water Hemlock is so toxic that it barely takes 15 minutes to 2 hours after consuming the plant to develop clinical signs or even die.

Symptoms of poisoning include nervousness, drooling, dilated pupils, muscle twitching, tremors, rapid breathing, increased heart rate, seizures, tremor, and coma.

Luckily, if instituted quickly, treatment can help save the life of the victim.

Now, although water hemlock is considered a bigger risk for grazing animals, there has been a report of a 3-year old border collie chowing down on water hemlock mistakenly. She died within the hour (source). So, better safe than sorry.

32. Jimson Weed (Thorn Apple)

This plant goes by many other names including devil’s trumpet. All parts of the plant contain toxins which are moderately poisonous to dogs. Symptoms include dilation of the pupils, sensitivity to light, anxiety, restlessness, intestinal stasis (the content of the intestines don’t flow normally), dry mouth, increased heartbeat, walking drunk, as well as respiratory failure (source).

33. Bleeding Heart

The Bleeding Heart plant is quite toxic to dogs, and all animals, in fact. Though the plant might look really attractive, it should never be consumed by pets due to its toxicity. Fortunately, this plant is not highly toxic. However, it contains alkaloids that can negatively affect dogs especially.

Some symptoms of poisoning include vomiting, tremors, diarrhea, and staggering (source).

34. Ornamental Bulbs

Especially in the fall, ornamental bulbs present a huge problem for gardeners with pets. Dogs are naturally curious and, as such, can get into digging up flower bulbs either planted or unplanted.

Some of the symptoms of ingestion of these ornamental bulbs range from mild stomach upset in dogs to more serious symptoms like cardiac arrhythmias, to seizures, even to death.

Ornamental bulbs are so poisonous, they cause more devastating effects when consumed than when foliage is consumed. This is because most of the toxins found in bulbous plants are concentrated in the bulbs (source).

35. Foxglove

Just like other flowers, Foxglove is quite beautiful. However, it is more dangerous than it is beautiful. In fact, Foxglove is more poisonous even to humans as they contain bufadienolides or cardenolides, naturally-occurring toxins that damage the heart.

Also called cardiac glycoside toxins, these poisons directly affect the heart muscles which destroys the heart.

There are many plants that contain glycosides. However, the level of poisoning each plant comes with depends on the plant being discussed. Mostly, every part of such plant is generally toxic. In fact, the water into which it is placed in the vase has also been reported to be toxic as well.

Symptoms of glycoside poisoning include abnormal heart rate and rhythm, a life-threatening increase in potassium levels, drooling, nausea, vomiting, tremors, dilation of pupils, as well as seizures (source).

36. Jerusalem Cherry

All parts of the Jerusalem Cherry, including the berries, are considered toxic as they contain solanine. Solanine is a glycoalkaloid which can cause grave irritations in the gut when ingested.

In some cases, symptoms might include diarrhea, drooling, ulceration, vomiting. In other cases, symptoms might be more related to the central nervous system like seizures and depression (source).

37. Larkspur

A beautiful flowering plant, the Larkspur contains toxins known as diterpene alkaloids which act by inhibiting acetylcholine. This action has a neuromuscular blocking effect which is symptomized by weakness, abnormal heart rhythms, drooling, abdominal pains, constipation, tremors, paralysis, and seizures.

If ingested in large quantities, these toxins can cause lung and heart failure which can result in death (source).

38. Lily of the Valley

Just like Foxglove, Lily of the Valley contains glycosides which cause about the same symptoms as foxglove.

Now, even though Lily of the Valley is not as poisonous as other lilies, be careful with it still. You must treat aggressively after poisoning is confirmed else things could quickly turn south.

Some of the clinical signs of poisoning include vomiting, reduced heart rate, diarrhea, cardiac arrhythmias, as well as seizures (source).

39. Marijuana

One of the reasons for the increased risk in marijuana poisoning in dogs is that it is becoming legalized in many states across the country.

As many vets have confirmed, dogs will be able to consume anything including marijuana, whether in the form of the raw leaf, or when infused into foods. Fortunately, consumption of marijuana is rarely fatal for dogs, although, it could leave them very sick.

Symptoms of marijuana poisoning include a loss of coordination, incontinence, as well as hypersensitivity (especially to touch and sounds). A slower heart rate and lower body temperature are also symptoms that might be presented with the ingestion of marijuana in dogs (source).

40. Stinging Nettle

Like the name sounds, this plant comes covered in tiny, fine hairs called trisomes. These trisomes typically break their tips when they are handled. As a result, they then inject histamine into the tissues of the dog who ingests it.

When ingested, histamine typically causes excessive salivation, vomiting, pawing at the mouth, breathing difficulties, ataxia, and muscle fasciculations or twitching (source).

41. Hyacinth

Just like tulips, hyacinths are highly poisonous as they contain allergenic lactones, or, in some cases, other similar alkaloids. These toxins are highly concentrated in the bulbs, in comparison to the leaves and flowers.

If ingested in large amounts, these toxins can result in severe clinical signs which can result in an irritation of the mouth or esophagus. The irritation of the mouth then produces drooling and vomiting. In some cases, it might even result in diarrhea.

In large amounts, more intense symptoms might result in an increase in the heart rate and breathing difficulties (source).

42. Chinaberry

With the Chinaberry tree, all parts of this plant are considered toxic especially the berries. The plant contains high levels of meliatoxins, especially the berries which have the highest concentration of the toxins.

Clinical signs of poisoning typically include excessive salivation, diarrhea, vomiting, and depression.

If ingested in too high a dose, toxicity can further lead to seizures and/or death (source).

43. Horse Chestnut

Horse Chestnuts are really attractive because of their shiny appearance. However, consuming these nuts could cause dogs to throw up, collapse, and even suffer paralysis of the respiratory system even. These nuts could also cause serious blockage of the gut in animals as well.

In most cases, all it takes are about 6 hours max for victims to start manifesting the horrific symptoms of poisoning (source).

44. Privet

Privet is generally mildly to moderately poisonous when consumed, still it is another plant to watch out for because very part of the shrub contains the toxin – oleanolic acid.

When ingested, privet affects the gut, leading to vomiting, diarrhea and loss of appetite. If consumed in high doses, symptoms might also aggravate to loss of coordination, as well as an increase in respiratory and heart rates, and then death (source).

45. Wisteria

Wisteria contains toxins known as lectin or wisterin glycoside. When consumed, this toxin leads to vomiting which might, sometimes, contain blood. It could also lead to diarrhea as well as depression (source).

46. Prairie Lily (Rain Lily)

The bulb of this lily is considered the most dangerous part of the plant. When consumed, the prairie lily can cause quite an intense stomach upset in dogs (source).

47. Calla Lily

This contains oxalate crystals (which we have discussed before). These crystals are absorbable into the skin when the dog comes in contact with them, even by nibbling alone.

When they come in contact with the mouth or when ingested, oxalate crystals cause a severe burning in the mouth, oral irritation, profuse drooling, vomiting, as well as swallowing difficulties (source).

48. Daphne

Generally, poisoning by Daphne is quite moderate until it is ingested in large amounts. The toxins (called diterpenes) are concentrated in the leaves, fruit, and bark of the Daphne plant.

When ingested, diterpenes can cause ulcerations of the mouth and esophagus, even the stomach. It might also lead to excessive drooling, vomiting, as well as bloody stooling.

If ingested in large amounts, poisoning might lead to seizure, coma, and although rare, even death is possible (source).

49. Belladonna (Deadly Nightshade)

Every part of the Belladonna is considered rather toxic, containing tropane alkaloids as well as scopolamine. This plant becomes even riskier in the fall when its shiny berries begin to fall. Because they are shiny, they are, potentially, very attractive to pets, and even children.

However, the alkaloids contained in Belladonna are anticholinergic. They interfere with nerve impulses by intercepting receptors in the nerve cells. This leads to hallucinations, an increased heart rate, depression, or even respiratory organ failure (source).

50. Climbing Nightshade

The Climbing Nightshade contains solanine which is moderately toxic. If ingested, this toxin produces diarrhea, vomiting, drowsiness, as well as reduced blood pressure and heart rate (source).

51. Nicotiana

Nicotiana contains nicotine which has been proven to be toxic to dogs among other animals. Some of the sign of nicotine poisoning in dogs include hyperexcitability followed by depression, vomiting, loss of coordination, paralysis, and even death is possible (source).

52. Lupine

Particularly, the seeds of the Lupine are considered toxic. It’s mostly a problem for ruminants but dogs can also be affected. The seeds, especially, are quite poisonous but are only really poisonous if consumed at too high a dose.

Some of the symptoms of poisoning include depression of the respiratory system, a reduced heartbeat, drowsiness, and convulsions (source).

53. Morning Glory

Depending on the amount of seeds ingested, Morning Glory is, generally, mildly to moderately poisonous when ingested. Also, not all species are poisonous.

For the poisonous species, though, only when a large amount of seeds are consumed at a time. When that happens, if that happens, lysergic alkaloids (toxins) are released which lead to certain clinical symptoms.

These symptoms include agitation, loss of coordination, mild vomiting, which may also be accompanied by diarrhea (source).

54. Star of Bethlehem

Acts like Foxglove.

55. Scotch Broom

Scotch Broom is, generally, mildly to moderately poisonous and that depends on the amount ingested.

The plant itself only contains small amounts of the toxin known as quinolizidine alkaloids found in all parts of the plant. When ingested, these alkaloids can cause abdominal upset, vomiting, loss of coordination, as well as an increase in heart rate (source).

56. Burning Bush

In times past, the Burning Bush was commonly used in Native America as folk medicine. However, this plant is now listed as unsafe in the Food and Drug Administration’s list of unsafe herbs.

Every part of this plant is considered toxic and can also be purgative and laxative to a dangerous degree.

Burning Bush contains cardiac glycosides which makes it even more toxic to pets, and even to humans (source).

57. Golden Chain Tree

The flowering vines produced by this tree contain quinolizidine alkaloids which are toxins. These toxins produce symptoms such as vomiting, loss of coordination, and weakness when consumed (source).

58. Mountain Laurel

This plant is so toxic, it is also known as “Sheepkill.” It is mostly found in pastures and, as such, is a danger to grazing animals mostly. This does not mean dogs can’t get poisoned by it, though.

Mountain laurels contain grayanotoxins known as diterpenoids. If ingested, they can interfere with sodium channels, and affect the muscles of the skeleton and the heart. Also, symptoms produced by this toxin could include vomiting, excessive salivation, diarrhea, tremors, arrhythmias, coma, as well as death (source).

59. Pokeweed

This is another plant where all its parts are toxic. Every part of the pokeweed contains toxins known as oxalates and saponins, and they can cause serious irritations in the gastrointestinal tract.

Now, although all parts of this plant are considered toxic, the berries are not really known to be as toxic. In fact, in most cases, they get egested from the body without much event.

Symptoms of pokeweed poisoning are usually seen as excessive salivation, throwing up, loss of appetite, diarrhea, tremors, reduced blood pressure (source).

60. Sweet Pea

Sweet Pea is only mildly to moderately toxic and the toxic principle here is aminoproprionitrite which is an amino acid.

If ingested, aminoproprionitrite can cause musculoskeletal as well as neurological signs which range from lethargy to weakness to seizures, and tremors.

Usually, this is a bigger threat for large, grazing animals. Nonetheless, dogs can also be affected by it (source).

61. Fig

While figs are, generally, not toxic for dogs, the plant itself can be, although toxicity is only mild. Fig plants are known to have quite an irritating sap.

Following ingestion, dog parents want to check their pet for any oral irritation or an irritation of the gastrointestinal tract. It’s also possible to observe a degree of dermal irritation if some of the sap gets to your dog’s skin (source).

62. Hydrangea

Contains cyanogenic glycosides, heavily concentrated especially in the flowers and leaves. If ingested, this plant causes lethargy, diarrhea, and vomiting (source).

63. Yellow Oleander

The parts most toxic in the Yellow Oleander are the fruits. These fruits contain all kinds of cardenolides which we know to be quite similar to what you have in Foxglove. They also act the same way as the toxins in Foxglove. Check the point on Foxgloves for more information (source).

64. Buttercup

Buttercups are mostly a threat to grazing animals as they are found in fields, grazing pastures, and meadows. Just a few are actually ornamental.

Anyway, Buttercup contains ranunculin which releases protoanemonin once masticated or crushed. The oil released irritates the mucous membranes in the gastrointestinal tract.

The flower part of the Buttercup is the most poisonous. Fortunately, it’s quite bitter and so the risk is reduced as animals are not normally tempted to eat large enough quantities of this to cause damage (source).

65. Iris

Irises tend to cause an irritation to the sinuses when handled or ingested. Toxins in the iris are concentrated in the bulbs or rhizomes of the plant.

Symptoms of poisoning include vomiting, excessive salivation, lethargy, and diarrhea (source).

66. Snowdrops

True to their name, these plants, indeed, look like snowdrops with their small, white flowers which hang down. In the stems, bulbs, and leaves of the snowdrops are the toxins which are phenanthridine alkaloids. The bulbs, however, have the highest concentration of the toxins.

If you think your dog might have ingested any part of this plant, look out for drooling, abdominal pain, vomiting, diarrhea, loss of coordination, a reduced blood pressure as well as reduced heart rate, and seizures (source).

67. Calla Lily

The Calla Lily contains insoluble calcium oxalate crystals which, when released into the tissue cause an irritation of the mouth and the alimentary canal.

Also, on some very rare occasions, ingestion might also lead to the inflammation of the upper part of the respiratory tract, leading to breathing difficulties (source).