Why
The ASPCA says nuts such as almonds, pecans and walnuts are high in oils and fats that can cause vomiting, diarrhea and potentially pancreatitis.
What to do instead
- Keep bowls of nuts and trail mix out of reach.
Watch out for
- Salted nuts add a salt problem too.
If your cat ate nuts
- 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.
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
Are nuts safe for cats?
Best avoided. Nuts are high in fat and can cause vomiting, diarrhea and pancreatitis.
What should I do if my cat ate nuts?
Most cats are fine after a small amount, but watch for vomiting, diarrhea or a change in behavior, and call your vet if anything worries you.
Sources
Checked October 17, 2026. We are a reference, not a vet: if in doubt, call yours. How we check.