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Only one of my two indoor cats ate about five fresh blackberries from a bowl on the counter. What should I do for her, and is there any risk to my other cat?

Cats · Food safety

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

Fresh blackberries are safe for cats, so there's no poisoning risk for either pet. The cat that ate them should be perfectly fine. The main thing to watch for is a possible mild stomach upset, like a single episode of vomiting or slightly loose stool within the next several hours, simply because it's an unusual food. Your other cat is not at risk from this incident. Just ensure both have access to fresh water, and if the one who ate the berries shows any persistent digestive upset, a call to your vet for advice is a good idea.

Blackberries — Food safety facts

Safe to share · Cats · full breakdown on the linked food page

Safe and full of antioxidants. Wash first and offer whole.

Dogs and cats carry the same rating (Safe to share), so the notes below hold for either pet.

Blackberries is not toxic to cats. The real limit is calories, fat and salt, so treat it as a small extra alongside the normal ration rather than a meal in itself.

There is no poisoning risk here, and the usual problem is simply eating too much at once: a heavy fat or salt load can bring on loose stools or a single vomit. Offer water, keep an eye on the pet for 24 hours, and do not induce vomiting.

The full verdict, portion guidance and serving notes are collected on the Blackberries food facts page.

Open the full food page: Blackberries food facts →