5 Common Foods That Can Be Fatal For Your Dog

Did you know that many common human foods can be fatal to dogs? In this blog post we learn which foods are dangerous for dogs.

7 min read·Updated: May 27, 2025
5 Common Foods That Can Be Fatal For Your Dog

Did you know that many common human foods can be fatal to dogs? In this blog post we learn which everyday fruits, vegetables, ingredients and snacks can be fatal food for dogs, and what to do if your pooch accidentally eats the wrong thing.

Is It Bad To Feed Dogs Human Food?

We know how hard it can be to say no when your dog looks up at you with those puppy-dog eyes, begging for a taste of the food on your plate. But if you give in, you could risk your dog’s health without knowing! Some ingredients commonly found in our everyday meals and snacks can be highly toxic or fatal food for dogs.

To help you know which human foods to keep your pooch away from, we have put together a list of ingredients you should avoid giving your dog at all costs.

Which Common Ingredients Are Fatal Foods for Dogs?

A small white dog, possibly a Maltese, lying down and looking at a variety of foods that are toxic to dogs. The foods displayed include grapes, chocolate, coffee beans, macadamia nuts, an avocado, and raisins, all arranged on a wooden surface.

1. Xylitol (Artificial Sweetener)

What is it?

Xylitol is an artificial sweetener often used in sugar-free or low-fat products. It replaces sucrose (sugar), and it’s just as sweet. It can be found in foods you might not expect, such as peanut butter and the obvious sugary snacks. It’s always worth checking the labels of baked goods, condiments (especially items like peanut butter!), and cereals.

What will it do to my dog?

If your dog digests xylitol, there is a risk that their blood sugar will drop. In extreme instances, this can lead to hypoglycemia (low blood sugar), causing loss of consciousness and sometimes even death. Visible symptoms of hypoglycemia include vomiting, trembling, lethargy, problems with coordination, and seizures. 

In severe cases, the ingestion of xylitol could cause necrosis (liver damage), where a massive number of liver cells abruptly die. This often has fatal results. The smaller your dog, the less xylitol it needs to consume to have dangerous implications.

What you should do

You need to act fast if your dog has digested xylitol, as symptoms can take effect as quickly as 30 minutes after consumption and continue to develop for up to 12 hours after consumption occurs. Your veterinarian will diagnose the seriousness of the situation, but treatment often includes hospitalization.

2. Cooked Bones & Fat Trimmings

What is it?

You know those bits of fat on the edge of cuts of meat? The really tasty, but extremely unhealthy parts – well, what do you do with them? Leaving it out for your dog to eat could be very dangerous. And what about the bones?

What will it do to my dog?

It would be easy to assume that the term “feed the dog a bone” would include the bones from your plate, but cooked bones crack and break much more easily. If you let your dog chew on them, the bones could break in their mouth and get stuck down their throat. Watch out for symptoms or signs of discomfort, because the broken bones could also cut their insides or cause constipation. In worst-case scenarios, the bones could pierce your dog’s gut, which could be fatal! Watch out for bloody stools, bloating (which can be deadly for dogs), or vomiting.

As for the fat, this can cause pancreatitis, which is a disease where the pancreas becomes inflamed. Your dog might experience vomiting, loss of appetite, or abdominal pain from the excess consumption of this fat.

What you should do

The first thing to do is calmly remove any remaining food from the dog’s reach or from their mouth if you can. Don’t move suddenly, though, because dogs are often territorial about food, and they might try to swallow it quickly. Call your veterinarian once the food is out of sight, and they will talk you through what should happen.

Avocado

What is it?

Avocado has become an extremely popular household buy in the past few years, following the trend of healthier diets and lifestyles. But your pup shouldn’t eat it with you!

What will it do to my dog?

Avocados contain persin, which many animals, including dogs, are allergic to. Persin is present in the avocado plant, including the pit, leaves, and fruit itself. When dogs consume any part of the avocado plant, they may experience vomiting and diarrhea, but in cases of high consumption, it could lead to pancreatitis or even be fatal.

What you should do

If you grow avocado plants at home, ensure they are well out of your dog’s reach. If your dog does eat some avocado or a part of the plant, call the veterinarian and take them for a diagnosis. In most cases, dogs will recover from persin poisoning with the treatment prescribed.

Onion & Garlic

What is it?

Any food in the onion family, including garlic, can be poisonous to dogs. Whether it is raw, cooked, or in powder form, a substantial amount of onion or garlic can harm your pooch.

What will it do to my dog?

Onions contain a substance called thiosulfate, which dogs can’t digest. You can imagine how uncomfortable their stomachs will feel! When dogs consume onions or garlic, the food might kill a large number of red blood cells, which can lead to anemia. If your dog eats a substantial amount, the signs you will need to look out for are weakness, vomiting or breathing problems. Consuming a large amount at once may be less problematic than consuming a small dose over a longer period of time.

What you should do

Consult the veterinarian as soon as possible, then they can carry out any necessary procedures. It might involve flushing out the stomach or inducing vomiting.

Salty Snacks

What is it?

Salt can be found on numerous snacks, such as chips and pretzels, and it’s a well-used feature on every dinner table. Salt can dehydrate minds and bodies in all animals, including dogs. Salt dries out moisture and destroys blood cells. Have you ever experienced a headache when you’ve eaten something super salty? High levels of dehydration can be dangerous for your dog, and it takes a lot less for them to dehydrate than it does for us.

What will it do to my dog?

Due to salt’s dehydrating effects, a salty snack can cause excessive thirst and urination—you might want to keep the garden door open—and too much can lead to sodium ion poisoning.

If your dog has eaten a lot of salt, the effects can be worse than a bit of thirst. Signs of overdoing the salt could be headaches, vomiting, diarrhea, shakes, depression, lethargy, high body temperature, and seizures. In some cases, it can be deadly.

What you should do

The first thing to do if you know your dog has eaten a salty food is to give them a large bowl of water. Rehydrating them is the first step toward avoiding salt poisoning. As soon as you’ve done that, call the vet. In some circumstances, hospitalization may be necessary for treatment, but the veterinarian can help diagnose how serious the situation is.

What Human Food Can Dogs Eat?

If you’re unsure whether a food will harm your dog, don’t give in to their adorable little faces. I know, I know, your dog is the smartest dog around, but even they won’t know if that food is bad for them or not.

Get yourself clued up on what people foods could be dangerous for your dog with our handy guide below, and keep them away from anywhere your dog can reach.

Clara HallifaxC
Written by

Clara Hallifax

A lover of all animals, especially dogs! I love to learn about the way they think, and what we as pet owners can do to better their lives. So what better way, than to write fun, informative content?! When I’m not typing away, you can find me trying to cook a new recipe (and failing), or of course playing with the dog.

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The information contained within this site is not intended as a substitute for professional medical or veterinary advice. PetLab Co. is not intended to diagnose, treat, cure or prevent any disease. If your pet has, or you suspect your pet has any medical condition, you are urged to consult your veterinarian. Medical conditions can only be diagnosed by a licensed veterinarian. These statements have not been evaluated by the Food and Drug Administration. Results May Vary. Not intended for human consumption. Please consult your veterinarian regarding any change in treatment or supplementation.
*In Amazon Pet Health Category in 2022
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