Human Foods That Are Toxic to Dogs: The Full Do-Not-Feed List
Several everyday human foods are genuinely dangerous for dogs, from chocolate and grapes to onions and sugar-free sweeteners. This guide lists the key offenders, the signs of poisoning to watch for, and exactly what to do if your dog eats something it shouldn't.
Quick answer
Several common foods are toxic to dogs, and some can be fatal in small amounts. The highest-risk items are chocolate, grapes and raisins, onions and garlic, xylitol (a sweetener), macadamia nuts, alcohol and caffeine. If your dog eats any of these, do not wait for symptoms — contact your vet or an emergency clinic straight away.
Several everyday human foods are genuinely dangerous for dogs, from chocolate and grapes to onions and sugar-free sweeteners.
The main do-not-feed list
The most common household poisons for dogs — keep all of these well out of reach.
- Chocolate — contains theobromine and caffeine. Darker and baking chocolate are far more dangerous than milk chocolate. Causes vomiting, agitation, racing heart, tremors and seizures.
- Grapes, raisins, sultanas and currants — can cause sudden kidney failure. The toxic dose is unpredictable, so treat any amount as an emergency.
- Onions, garlic, leeks and chives (raw, cooked or powdered) — damage red blood cells and cause anaemia. Cumulative, so repeated small amounts add up.
- Xylitol / birch sugar — a sweetener in sugar-free gum, sweets, some peanut butters and baked goods. Causes a dangerous drop in blood sugar and liver failure very quickly.
- Macadamia nuts — cause weakness, tremors and overheating.
- Alcohol and raw yeast dough — dough rises in the stomach and produces alcohol; both cause serious poisoning.
- Caffeine — coffee, tea, energy drinks and grounds.
Foods that are risky but not classic poisons
Some foods will not "poison" your dog but can still cause serious harm: cooked bones (can splinter and perforate the gut), fatty trimmings and rich table scraps (can trigger pancreatitis), corn cobs and stone-fruit pits (cause blockages), and very salty foods. Treat these as off-limits too.
Signs of poisoning to watch for
Symptoms vary by toxin but commonly include vomiting, diarrhoea, drooling, weakness or collapse, tremors or seizures, unusual drowsiness or agitation, a fast heart rate, and pale gums. Signs can be delayed by hours, so act on the exposure, not just visible symptoms.
What to do right now
- Take the food away and stop any further access.
- Note what was eaten, the amount, and the time.
- Keep packaging or a photo of the ingredient list.
- Call your vet or emergency clinic and follow their instructions.
- Do not induce vomiting or give home remedies unless told to.
Keep your vet and nearest emergency clinic numbers somewhere everyone can find fast.
Quick FAQs
How much chocolate is dangerous? It depends on the type and your dog's weight — dark chocolate is far riskier. Rather than guess, call your vet with the details.
My dog ate one grape — is that really an emergency? Because the toxic dose is unpredictable, yes, treat it seriously and call your vet for advice.
Should I make my dog vomit at home? Only if a vet instructs you to. For some substances, home-induced vomiting causes more damage.
Are cooked onions safer than raw? No. Cooking does not remove the toxin, and onion powder in sauces and gravies is just as harmful.