Toxic Foods for Dogs: List and Risk Table
The most dangerous human foods for dogs are chocolate, grapes and raisins, xylitol (a sweetener in sugar-free gum and candy), onions and garlic, macadamia nuts, alcohol and raw yeast dough. Some cause signs within hours and others damage organs such as the kidneys or liver, so if you suspect your dog ate any of them, call your veterinarian right away, even if your dog looks fine.
Which human foods are toxic to dogs?
This table summarizes the most common ones, based on the ASPCA and the Merck Veterinary Manual. Timing is approximate: every dog reacts differently depending on size and how much was eaten.
| Food | Why it is dangerous | Signs and timing |
|---|---|---|
| Chocolate, cocoa and coffee | They contain theobromine and caffeine (methylxanthines). More cocoa means more risk: cocoa powder and baking chocolate are the worst, white chocolate the least dangerous. | Vomiting, diarrhea, thirst, restlessness, tremors, abnormal heart rhythm. Usually starts 6 to 12 hours later. |
| Grapes and raisins | They can cause kidney failure. More than one grape or raisin per 10 lb (4.5 kg) of body weight may pose a risk. | Vomiting or diarrhea at 6-12 hours; kidney damage within 1 to 3 days. |
| Xylitol | Lowers blood sugar and, at high doses, can damage the liver. Found in gum, candy, some peanut butters, toothpaste and sugar-free baked goods. | Weakness, vomiting, poor coordination, seizures. Can start within 30 minutes; liver injury may show at 24 to 48 hours. |
| Onions, garlic and chives | Damage red blood cells and can cause anemia. Cats are even more sensitive. | Stomach upset first; tiredness and pale gums later. |
| Macadamia nuts | Illness has been reported only in dogs. | Weakness, tremors, vomiting and fever; usually resolves in 12 to 48 hours. |
| Alcohol and raw yeast dough | Alcohol absorbs quickly; dough expands in the stomach and also produces alcohol. | Poor coordination, vomiting, bloated belly, lethargy. This is an emergency. |
| Excess salt | Upsets electrolyte balance. | Heavy thirst, vomiting, tremors. |
Avocado is mainly a concern for birds, rabbits and farm animals; the direct risk for dogs and cats is lower, although the pit can cause choking and the fat can upset the stomach.
What should I do if my dog ate something on this list?
- Remove the rest of the food and keep the packaging so you know what and how much was eaten.
- Write down the time, your dog's weight and the approximate amount.
- Call your veterinarian or an emergency clinic right away. Do not wait for signs to appear.
- Do not use home remedies or induce vomiting without professional advice; depending on the case it can make things worse.
If it was chocolate, you can estimate the risk with our dog chocolate toxicity calculator, designed to guide you while you contact your veterinarian. If it was grapes, see our guide on which fruits dogs can eat.
When to see a vet: immediately if your dog ate xylitol, grapes or raisins, a large amount of chocolate, raw dough or alcohol, or if there is repeated vomiting, tremors, seizures, weakness, a swollen belly or pale gums. In these cases time matters more than waiting for signs.
How do I prevent an accident at home?
- Store chocolate, gum, sugar-free candy and nuts in closed drawers or cabinets, not on the table or in a purse.
- Close the trash can: onion scraps, avocado pits, coffee grounds and candy wrappers are a temptation.
- Tell guests and children not to feed your dog, especially at birthdays, parties and family meals.
- Check the label of toothpaste, peanut butter and homemade treats for xylitol.
- Keep bread dough and alcoholic drinks out of reach, even a forgotten glass on the floor.
- Keep your vet's phone number and a 24-hour emergency clinic handy.
What can dogs eat safely?
Some fruits and vegetables are safe in small portions, such as cooked carrot, seedless apple or seedless watermelon. See the full list in What Fruits Can Dogs Eat?. And if your cat has stopped eating, read My Cat Won't Eat: Causes and When to See a Vet.
Frequently asked questions
How much chocolate is dangerous for a dog?
It depends on your dog's weight and the type of chocolate. The Merck Veterinary Manual says mild signs can appear at about 20 mg of methylxanthines per kilogram and heart effects at 40 to 50 mg/kg. Because cocoa powder and dark chocolate contain far more than white chocolate, use a calculator and always call your vet.
Can a single grape hurt my dog?
Sensitivity varies widely between dogs and cannot be predicted, so the advice is to call your vet even after a single grape.
Are cats poisoned by these foods too?
By several of them: chocolate, onions and garlic (cats are more sensitive), alcohol and raw dough. Xylitol mainly affects dogs, according to the Merck Veterinary Manual.
Can I share a little food from my plate?
Better not to. Seasonings, salt, fat and hidden ingredients like xylitol or onion make human food a risky bet.
What if I do not know what my dog ate?
Check for missing packaging or leftovers, watch your dog's behavior and call your vet anyway to share what you suspect. A call too many is better than arriving too late.
To check the ingredients in your dog's food and treats, the MyPet scanner reads the label and flags ingredients worth a second look. Try it in the MyPet app.
Sources
Original source: aspca.org