Some everyday human foods are genuinely toxic to dogs. The most dangerous include xylitol, grapes and raisins, chocolate, onions and garlic, macadamia nuts, and alcohol. Below is a clear list of foods dogs can’t eat, why each is harmful, and exactly what to do if your dog gets into something. Keep the ASPCA Animal Poison Control number handy: 888-426-4435.
12 foods dogs can’t eat
- Xylitol (sugar-free sweetener)In sugar-free gum, sweets, some peanut butters, baked goods and toothpaste. Causes a rapid, dangerous blood-sugar crash and can lead to liver failure. One of the most serious household toxins.
- Grapes, raisins, currants & sultanasCan cause acute kidney failure, with no known safe dose — some dogs react to a tiny amount. Includes grape juice and raisin baked goods.
- ChocolateTheobromine and caffeine affect the heart and nervous system. Dark and baking chocolate are far more dangerous than milk. See our chocolate toxicity calculator.
- Onions, garlic, leeks & chivesThe allium family damages red blood cells and can cause anaemia, raw or cooked. Watch for these in sauces, stocks and seasoned leftovers.
- Macadamia nutsCause weakness, tremors, vomiting and overheating in dogs, even in small amounts.
- Alcohol & raw yeast doughAlcohol is highly toxic; raw bread dough ferments in the stomach, producing alcohol and dangerous bloating.
- Caffeine (coffee, tea, energy drinks)A stimulant dogs handle poorly — causes restlessness, racing heart and tremors.
- Cooked bonesSplinter and can cause choking, mouth injuries or gut blockages and perforations.
- Fatty trimmings & fried foodRich, fatty foods can trigger painful, sometimes life-threatening pancreatitis.
- AvocadoContains persin and the large pit is a choking and obstruction hazard; best avoided.
- Salt & very salty snacksLarge amounts can cause sodium poisoning — vomiting, tremors and worse.
- Raw/undercooked meat & eggs and unpasteurised dairyRisk of harmful bacteria; many dogs are also lactose-intolerant and get an upset stomach from milk and cheese.
Signs of food poisoning in dogs
Symptoms depend on the food, but common red flags include vomiting, diarrhoea, drooling, lethargy or weakness, tremors, a racing heart, collapse or seizures. Some toxins (like xylitol) act within minutes; others (like grapes) may take a day or more to show kidney effects, which is exactly why you should not wait for symptoms before calling for advice. For a broader symptom guide see signs of a sick dog and first aid for dogs.
What dogs can safely enjoy
Plenty of foods make healthy treats in moderation: plain cooked chicken or turkey, carrot sticks, green beans, plain pumpkin, blueberries and small pieces of apple (no seeds or core). Keep treats to about 10% of daily calories so they don’t unbalance the diet — our treats and calories guide explains the maths. When in doubt about any food, check with your vet rather than guessing.
Frequently Asked Questions
What is the most dangerous food for dogs?
Several foods are genuinely dangerous, but xylitol, grapes and raisins, and chocolate top most veterinary lists. Xylitol (a sweetener in sugar-free gum, sweets, peanut butter and baked goods) can cause a sudden, life-threatening drop in blood sugar and liver failure. Grapes and raisins can cause acute kidney failure in some dogs even in small amounts. Chocolate's theobromine affects the heart and nervous system. Any of these warrants an immediate call to your vet or poison control.
Can dogs eat grapes or raisins?
No. Grapes, raisins, currants and sultanas can cause acute kidney failure in dogs, and the toxic dose is unpredictable - some dogs react to a tiny amount. There is no known safe quantity, so keep all forms, including grape juice and baked goods containing raisins, well away from dogs. If your dog eats any, contact your vet straight away.
My dog ate something toxic - what should I do?
Act fast and do not wait for symptoms. Call your veterinarian or the ASPCA Animal Poison Control Center (888-426-4435) immediately, with details of what and how much was eaten and when. Do not induce vomiting unless a professional tells you to, as it can be harmful with certain substances. Keep packaging to show the ingredients.
Is xylitol really that dangerous to dogs?
Yes. Xylitol is one of the most dangerous common household toxins for dogs. It triggers a rapid insulin release that can crash blood sugar within minutes, and larger doses can cause liver failure. It hides in sugar-free gum, mints, sweets, some peanut butters, toothpaste and baked goods. Always check labels before sharing food, and store these items out of reach.
Sources
- ASPCA — pet care and Animal Poison Control guidance (people foods to avoid)
- American Kennel Club (AKC) — expert advice on dog health and care (foods toxic to dogs)
- American Veterinary Medical Association (AVMA) — pet owner resources (household hazards)
Last updated 21 June 2026.
