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The most dangerous foods toxic to dogs are chocolate, grapes and raisins, xylitol (the sweetener in sugar-free gum), onions and garlic, macadamia nuts and alcohol. Some of these cause signs within hours and others only days later, so if your dog ate one of them, call your vet without waiting for symptoms. On this page you'll find the list of foods toxic to dogs, why each one is dangerous, when the signs appear, and what to do in the first minutes.
Quick answer
Foods dogs should never eat
- Chocolate and cocoa (dark and baking chocolate are the worst)
- Grapes and raisins (even small amounts)
- Xylitol (sugar-free gum, candy, some peanut butters and toothpastes)
- Onions, garlic, leeks, chives (raw, cooked or powdered)
- Macadamia nuts
- Alcohol, coffee, tea, energy drinks
- Raw yeast dough
Toxic foods and their signs
| Food | Why it's dangerous | When signs appear |
|---|---|---|
| Chocolate | Theobromine and caffeine affect the heart and nervous system | 2–12 hours: vomiting, restlessness, fast heart rate, tremors |
| Grapes, raisins | Can cause kidney failure; no safe amount is known | Vomiting within hours; kidney signs in 1–3 days |
| Xylitol | Drops blood sugar fast and can damage the liver | 10–60 minutes: weakness, stumbling, seizures |
| Onion, garlic | Destroys red blood cells, causing anemia | 1–5 days: tiredness, pale gums, dark urine |
| Macadamia nuts | Muscle weakness and fever | Within 12 hours: weak hind legs, tremors |
| Alcohol | Lowers blood sugar and body temperature, slows breathing | 30–60 minutes: stumbling, vomiting, drowsiness |
| Raw yeast dough | Rises in the stomach and produces alcohol | Within hours: bloated belly, trying to vomit |
A late start doesn't mean nothing happened. With grapes and onions in particular, a dog can look completely fine on the first day.
Where these foods hide
The danger is often not in the food itself but in the dish it's hiding in:
- Raisins: Trail mix, granola, cakes, cookies, bread, rice dishes and stuffings.
- Onion and garlic: Leftovers, soups, sauces, gravy, meatballs, stock cubes and seasoning mixes. Scraps from the table are the most common source.
- Chocolate: Holiday treats, brownies, chocolate spreads and baking supplies.
- Xylitol: Sugar-free gum left in a bag or coat pocket, some diet products and anything labeled "sugar-free." Read the label: it may say "xylitol," "E967" or "birch sugar."
- Cooked bones: Not toxic, but they can splinter and injure the mouth, throat or intestines. Chicken and lamb bones are especially risky.
Lesser-known dangers
- Fatty food: Fried food, meat fat, bacon and chicken skin can trigger pancreatitis.
- Corn cobs, peach and apricot pits: Can block the intestines; some fruit pits also contain toxic compounds.
- Moldy food and compost: Mold can produce toxins that cause tremors and seizures; keep trash and compost closed.
- Very salty food: Pickle brine, salty snacks and homemade play dough.
- Nutmeg: Large amounts can cause tremors and agitation.
What to do if your dog ate something toxic
- Move your dog away from the food and collect what's left.
- Note what they ate, roughly how much and when. Keep the packaging or label.
- Call your vet or the nearest 24-hour clinic without waiting for signs. SarPet's emergency panel shows the open clinics closest to you. In the US, the ASPCA Animal Poison Control Center (888-426-4435) and Pet Poison Helpline (855-764-7661) also take calls, for a fee.
- Don't try to make your dog vomit at home. Salt water, mustard or fingers can hurt your dog. If vomiting is needed, your vet will tell you and do it safely.
- Don't give milk, yogurt or anything else. Most home remedies said to "neutralize" poisons don't work, and some do harm.
Acting early makes treatment easier for most poisonings. Calling is always safer than waiting because "they only had a little"; how much is dangerous depends on your dog's weight and the food, and that's what your vet will work out.
Making your home safer
- Use a lidded trash can or keep it inside a cupboard.
- Ask guests not to share food from the table, and explain it to children.
- Hang bags and coats out of reach; gum and candy usually live there.
- Don't leave food out on counters and coffee tables.
- Use only treats made for dogs.
Safe foods to use as treats
In small amounts and prepared plain, these suit most dogs:
- Boiled chicken or turkey, boneless and skinless
- Carrots, cucumber, plain cooked pumpkin
- Apple without seeds or core, banana
- Plain cooked rice
Treats shouldn't go above about a tenth of daily calories. If your dog gains weight easily, the dog weight loss plan is worth a look.
Frequently asked questions
My dog ate a piece of chocolate. What should I do?
Note the type of chocolate (milk, dark, baking), how much, and your dog's weight, then call your vet. The risk depends on all three; dark and baking chocolate are far more dangerous.
My dog ate sugar-free gum. How urgent is it?
Very urgent. Xylitol can drop blood sugar within 10–60 minutes. Take the packaging and call your vet or the nearest open clinic right away; if your dog collapses or trembles on the way, let the clinic know.
Can I give my dog peanut butter?
Plain, unsalted peanut butter without xylitol is usually fine in small amounts. Read the label every time; ingredients can differ between products of the same brand.
My dog ate coffee grounds or a tea bag.
Coffee grounds and tea bags contain concentrated caffeine. They can cause restlessness, vomiting and a fast heart rate; call your vet.
Is a single grape dangerous?
No safe amount of grapes is known, and some dogs react to very little. Call your vet even if it was just one.
Does the same list apply to cats?
Onions, garlic, chocolate and alcohol are dangerous for cats too. Some houseplants are also very risky for cats; see plants toxic to cats.
Sources
This guide is for information only and does not replace a veterinary exam.
