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My 4 kg cat with early kidney disease ate one raisin from the floor — is this extra dangerous for her kidneys?

Cats · Food safety

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

Short answer

Yes, this is especially dangerous. Even one raisin can cause acute kidney failure in a healthy cat, and a cat with existing kidney disease has much less reserve. For a 4 kg cat, the toxin in that single raisin could push her kidneys into crisis within 24 hours. Do not wait for signs like vomiting or increased thirst — those are late indicators of kidney damage. Call your vet or an emergency clinic immediately. They will likely want to see her right away to start supportive care and monitor her kidney values.

Raisins — Food safety facts

Do not feed · Cats · full breakdown on the linked food page

Toxic, like grapes — a small amount can cause acute kidney failure. Even one raisin for a small dog deserves a vet call.

Dogs and cats carry the same rating (Do not feed), so the notes below hold for either pet.

Raisins should not be given to cats at all. Even a small amount can do harm, so there is no portion small enough to be safe.

Do not induce vomiting and do not give milk or oil to “dilute” it. Note the food and roughly how much was eaten, then call your vet or a pet poison hotline and follow their advice on whether to bring the pet in straight away.

Why these cautions matter

Grapes and raisins are linked to kidney failure in dogs, and no safe amount is reliable — some pets react after only a few.

Raisins has no place in everyday feeding: keep the rest of the day's food unchanged after this and watch the litter box and how quickly they finish the next meal.

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

Open the full food page: Raisins food facts →