Why
The ASPCA says citrus stems, leaves, peels and seeds contain citric acid and essential oils that can cause irritation, while small amounts of the fruit usually cause only minor stomach upset.
What to do instead
- There is no reason to share citrus with a cat.
Watch out for
- Keep citrus essential oils away from cats.
If your cat ate oranges
- 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 fruit: quick answers
| Food | Verdict | Short answer |
|---|---|---|
| Bananas | Small amounts | A small piece now and then. Bananas are safe but high in sugar. |
| Coconut | Small amounts | A very small amount is unlikely to cause harm, but it can upset the stomach. |
| Peaches | Small amounts | A small piece of peeled flesh is fine. Never the pit, stem or leaves. |
| Watermelon | Small amounts | A little seedless flesh is fine. Remove the rind and seeds. |
| Grapes | Toxic | No. Grapes are on vets' do-not-feed lists for pets. |
| Raisins | Toxic | No. Raisins are on vets' toxic lists for pets, just like grapes. |
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 oranges safe for cats?
Best avoided. Citrus oils and acid can irritate, though a small taste usually only upsets the stomach.
What should I do if my cat ate oranges?
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.