Why
Chocolate contains methylxanthines (theobromine and caffeine). PetMD lists heart rhythm problems, muscle tremors and seizures. Dark and baking chocolate carry the most, and white chocolate the least.
What to do instead
- Keep all chocolate and cocoa out of reach.
Warning signs
- Watch for vomiting, restlessness, a racing heart or tremors.
- Note the type and amount eaten, then call your vet or a poison line.
If your cat ate chocolate
- Note how much your cat ate and when, and keep any packaging.
- Call your vet, an emergency clinic, ASPCA Animal Poison Control ((888) 426-4435) or the Pet Poison Helpline (855-764-7661).
- Don't make your cat vomit unless a vet tells you to.
Other sweets: quick answers
| Food | Verdict | Short answer |
|---|---|---|
| Xylitol (sugar-free gum and candy) | Toxic | No. Xylitol is a sweetener the ASPCA lists as dangerous to pets. |
Rules for any new food
- Plain is the rule: no salt, butter, oil, onion, garlic, sugar or sweeteners. Most of the danger in human food comes from what is added to it.
- Keep all treats under 10% of your cat's daily calories . The rest should come from a complete cat food.
- Check labels for onion and garlic powder, which turn up in stock, gravy, baby food and seasoned meat.
- If your cat has a health condition, such as diabetes, kidney disease or a sensitive stomach, ask your vet before adding any new food.
Frequently asked questions
Is chocolate safe for cats?
No. Chocolate is toxic to cats. Darker chocolate is more dangerous.
What should I do if my cat ate chocolate?
Call your vet, an emergency clinic, or ASPCA Animal Poison Control at (888) 426-4435 right away. Note how much your cat ate and when.
Sources
- ASPCA Animal Poison Control, "People Foods to Avoid Feeding Your Pets"
- PetMD, "Human Foods That Are Dangerous for Cats" (reviewed by Nicole Silva, DVM)
Checked October 17, 2026. We are a reference, not a vet: if in doubt, call yours. How we check.