25 Foods Toxic to Dogs: Complete List with Symptoms & What to Do

Every year, the ASPCA Animal Poison Control Center handles over 400,000 cases of potential pet poisoning. A significant portion involves common household foods that owners didn't realize were dangerous. Some of these foods cause mild stomach upset, while others can trigger organ failure within hours.

This guide organizes 25 toxic foods into three severity levels so you know which situations demand an emergency vet visit and which require monitoring at home. Keep this list accessible — when poisoning happens, quick action saves lives.

Emergency Contact Information

If your dog eats something toxic, time matters. Save these numbers in your phone now:

• ASPCA Animal Poison Control: (888) 426-4435 (consultation fee applies, available 24/7)
• Pet Poison Helpline: (855) 764-7661 (consultation fee applies, available 24/7)
• Your local emergency vet: Find and save this number before you need it

Never induce vomiting unless specifically instructed by a veterinarian or poison control. Some substances cause more damage coming back up.

Immediately Dangerous Foods (Seek Emergency Care)

These foods can cause organ damage, seizures, or death even in small amounts. If your dog ingests any of these, contact your veterinarian or poison control immediately — do not wait for symptoms to appear.

1. Xylitol (Birch Sugar)

Found in sugar-free gum, candy, peanut butter, toothpaste, and baked goods. Xylitol triggers a massive insulin release in dogs, causing blood sugar to crash within 10-60 minutes. Higher doses cause liver failure within 72 hours. As little as 0.1 g/kg body weight can cause hypoglycemia.

2. Chocolate

Contains theobromine and caffeine, both toxic to dogs. Dark chocolate and baking chocolate are most dangerous — just one ounce of baking chocolate can be lethal for a 10-pound dog. Milk chocolate is less concentrated but still dangerous in quantity. Symptoms appear 6-12 hours after ingestion and include vomiting, diarrhea, rapid breathing, seizures, and cardiac arrhythmia.

3. Grapes and Raisins

The exact toxic compound remains unidentified, which makes this especially dangerous — there's no known safe amount. Some dogs eat grapes without issue while others develop acute kidney failure from a single grape. Symptoms include vomiting, lethargy, and decreased urination within 24-72 hours. Treat every exposure as an emergency.

4. Macadamia Nuts

Cause weakness, vomiting, tremors, and hyperthermia within 12 hours. While rarely fatal alone, macadamia nuts combined with chocolate (common in cookies) multiply the danger significantly. Toxic dose starts at approximately 2.4 g/kg body weight.

5. Onions and Garlic

All allium family members (onions, garlic, leeks, chives, shallots) damage red blood cells, causing hemolytic anemia. Garlic is roughly 5 times more potent than onions. Symptoms may not appear for several days: lethargy, pale gums, rapid breathing, dark-colored urine. Cooked, raw, powdered — all forms are toxic.

6. Alcohol

Dogs are far more sensitive to ethanol than humans. Beer, wine, liquor, and fermented dough all pose risks. Symptoms include vomiting, disorientation, difficulty breathing, coma, and death. Even small amounts relative to body size can cause dangerous blood sugar drops and hypothermia.

7. Caffeine

Coffee grounds, tea bags, energy drinks, and caffeine pills are all hazardous. Dogs cannot metabolize caffeine as efficiently as humans. Symptoms mirror chocolate toxicity: restlessness, rapid breathing, heart palpitations, muscle tremors, seizures. There is no antidote for caffeine poisoning.

8. Yeast Dough (Raw)

Unbaked bread dough expands in the warm, moist environment of a dog's stomach, potentially causing gastric dilation or even rupture. The fermentation process also produces alcohol, creating a dual toxicity risk. This is a surgical emergency if the dough has expanded significantly.

Moderately Dangerous Foods (Call Your Vet)

These foods cause significant illness and may require veterinary intervention depending on the amount consumed and your dog's size.

9. Avocado

The flesh contains persin, which causes vomiting and diarrhea. The larger danger is the pit — it's a choking hazard and can cause intestinal blockage. While the flesh is less toxic to dogs than other animals, the high fat content can trigger pancreatitis.

10. Cooked Bones

Cooking makes bones brittle and prone to splintering. Splinters can puncture the esophagus, stomach, or intestines, causing internal bleeding or peritonitis. Cooked chicken bones and rib bones are the most common culprits.

11. Nutmeg

Contains myristicin, which causes hallucinations, increased heart rate, disorientation, abdominal pain, and seizures. A small sprinkle on food isn't typically dangerous, but ingesting a whole nutmeg or significant amount of ground spice requires veterinary attention.

12. Hops

A serious concern for homebrewers. Both fresh and spent hops cause malignant hyperthermia in dogs — body temperature spikes to 105°F+ and can be fatal. Symptoms appear within hours and include restlessness, panting, vomiting, and rapidly rising temperature.

13. Persimmons, Peaches, and Plums (Pits)

The pits contain cyanogenic compounds and present choking and intestinal blockage hazards. Peach and plum pits contain amygdalin, which converts to cyanide during digestion. If your dog swallows a pit whole, monitor for signs of obstruction: vomiting, loss of appetite, constipation.

14. Rhubarb and Tomato Leaves

Contain oxalates that can affect the digestive, nervous, and urinary systems. Large amounts cause kidney damage. While a dog nibbling a tomato plant leaf is rarely serious, consuming significant quantities of rhubarb leaves warrants a vet call.

15. Star Fruit

Contains soluble oxalates that can cause acute kidney failure, particularly in dogs with pre-existing kidney issues. Symptoms include vomiting, decreased appetite, and changes in urination patterns.

16. Mushrooms (Wild)

While store-bought mushrooms are generally safe, wild mushrooms can be deadly. Since identifying toxic species is extremely difficult, treat any wild mushroom ingestion as potentially poisonous. Amanita species cause liver failure; others affect the nervous system or kidneys.

17. Fat Trimmings and Greasy Foods

Large amounts of fat — turkey skin, bacon grease, butter — can trigger acute pancreatitis. This is a painful, sometimes life-threatening condition requiring hospitalization. Small breed dogs and those with a history of pancreatitis are most at risk.

Mild to Moderate Risk Foods (Monitor at Home)

These foods typically cause gastrointestinal upset rather than organ damage. Monitor your dog and contact your vet if symptoms persist beyond 24 hours or worsen.

18. Milk and Dairy

Many dogs are lactose intolerant. Milk, ice cream, and soft cheeses cause bloating, gas, diarrhea, and abdominal discomfort. While not toxic, frequent dairy consumption can lead to chronic digestive issues. Small amounts of hard cheese or plain yogurt are usually tolerated.

19. Corn on the Cob

The corn itself isn't toxic, but the cob is a notorious intestinal blockage hazard. Dogs often swallow large chunks of cob that cannot pass through the digestive tract, requiring surgical removal. Always discard cobs in a dog-proof bin.

20. Cherries

The flesh is safe in small quantities, but pits, stems, and leaves contain cyanide. A dog that eats a few cherries with pits will likely experience mild gastrointestinal upset. Larger quantities pose a genuine cyanide risk.

21. Raw Eggs

Risk of Salmonella and E. coli, plus avidin in raw egg whites interferes with biotin absorption. Occasional raw egg consumption is unlikely to cause problems, but regular feeding can lead to biotin deficiency manifesting as skin and coat issues.

22. Salt (Excessive)

Large quantities of salt cause sodium ion poisoning: vomiting, diarrhea, tremors, elevated body temperature, seizures. This is most common from dogs eating play dough, rock salt, or salty snack bags. Always ensure fresh water is available.

23. Coconut and Coconut Oil (Excessive)

Small amounts are fine and even beneficial. However, large quantities cause stomach upset and diarrhea due to high fat and medium-chain triglycerides. Coconut water is high in potassium and should be avoided.

24. Citrus

The fruit flesh in small amounts isn't dangerous, but the peel, seeds, and leaves contain citric acid and essential oils that cause irritation and central nervous system depression if consumed in significant quantities. Most dogs dislike the taste, making large ingestion unlikely.

25. Spicy Foods

Capsaicin causes gastrointestinal irritation in dogs — stomach pain, diarrhea, vomiting, and excessive thirst. While not technically toxic, spicy foods cause unnecessary discomfort and can lead to dehydration from vomiting and diarrhea.

Complete Toxicity Reference Table

Safe Alternatives: What to Give Instead

Dogs beg for human food — it's in their nature. Instead of sharing something potentially harmful, offer these safe alternatives that most dogs love:

• Instead of chocolate: Carob treats (naturally sweet, no theobromine)
• Instead of grapes: Blueberries or watermelon (seedless, no rind)
• Instead of ice cream: Frozen plain yogurt or frozen banana slices
• Instead of chips: Air-popped popcorn (no salt or butter)
• Instead of candy: Small pieces of apple (no seeds) or sweet potato
• Instead of cookies: Commercial dog biscuits or dehydrated sweet potato chews
• Instead of peanut butter with xylitol: Xylitol-free peanut butter (check every label)
• Instead of cheese (if lactose intolerant): Small pieces of cooked chicken breast

When calculating how much your dog should eat including treats and safe snacks, use our dog food calculator to determine their total daily calorie needs. Remember: treats and extras should never exceed 10% of daily calories.

What to Do If Your Dog Eats Something Toxic

Stay calm and act quickly. Follow these steps:

1. Remove access — Take the food away and prevent your dog from eating more
2. Identify what was eaten — Note the food, approximate amount, and when it was consumed
3. Check the severity — Use the table above to determine the risk level
4. Call for help — For critical items, call your vet or ASPCA Poison Control immediately
5. Do NOT induce vomiting unless instructed by a professional
6. Save packaging — Bring wrappers or product labels to the vet
7. Monitor vital signs — Note breathing rate, gum color, alertness, and any symptoms

For a deeper understanding of what your dog should and shouldn't eat on a daily basis, explore our guides on homemade dog food recipes and breed-specific feeding advice like our Golden Retriever feeding guide.

Prevention Is the Best Medicine

The majority of food poisoning cases are preventable. Keep toxic foods stored securely, educate family members (especially children) about what dogs cannot eat, and dog-proof your kitchen trash. Consider baby gates to keep dogs out of the kitchen during meal prep, and always check ingredient labels on peanut butter and sugar-free products for xylitol.

Your dog depends on you to keep their environment safe. A few minutes of prevention is worth more than any emergency vet visit.