Can cats eat Peanut butter?
Caution. Plain peanut butter isn't toxic but is high in fat and salt, and some brands — especially 'low sugar' or 'no added sugar' — contain xylitol, which is a fatal cat toxin. Always check the label before any exposure.
Key facts
- Verdict: Caution — some risk involved. See the detail below before giving peanut butter to your cat.
- Category: Nuts
- Onset: Signs can start 10–60 minutes (xylitol) — see the full timeline below.
If your cat has eaten peanut butter
- If the jar contains xylitol: medical emergency. Call your vet or the Animal PoisonLine on 01202 509000 immediately.
- If xylitol-free: monitor for vomiting or diarrhoea over 24 hours.
What's the full picture?
Xylitol is the main concern. If the peanut butter label lists xylitol, birch sugar, or 'natural sweetener' (which can mean xylitol), treat any exposure as a medical emergency — xylitol toxicity in cats is rapid and severe.
Even xylitol-free peanut butter is high in fat and often salt. It's sometimes used to disguise pills, which is fine in pea-sized amounts occasionally, but not as a regular treat.
Cats don't usually seek out peanut butter, but dogs living in the same house may — and a cat licking smeared peanut-butter off a plate or child's face after a sandwich is a realistic exposure.
Symptoms to watch for
Hidden sources you might not think of
- 'No sugar added' and 'natural sweetener' peanut butters (may contain xylitol)
- Protein peanut butters marketed to gym-goers
- Kids' lunchbox portions
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Related
Sources referenced for this guidance
- Veterinary Poisons Information Service (VPIS) — UK clinical toxicology reference used by vets
- International Cat Care — feline-specific clinical guidance
- BSAVA — British Small Animal Veterinary Association reference materials
- Merck Veterinary Manual — professional veterinary reference
About this guidance
Every entry on this site is compiled from published UK veterinary toxicology sources — International Cat Care, Veterinary Poisons Information Service (VPIS) references, RCVS-registered practice materials, and peer-reviewed feline medicine literature. Where the evidence is mixed, we err on the cautious side because cats are unusually sensitive to many common substances that are harmless to humans and even to dogs.
This is general information written for UK cat owners. It is not personalised veterinary advice for your specific cat, their age, weight, medical history, or the exact exposure you're dealing with. If your cat has eaten something or is unwell, call your vet first. The Animal PoisonLine on 01202 509000 is available 24/7 for a small fee and can tell you whether an emergency visit is needed.
Entries are reviewed and updated as new research emerges. Spotted an error? Let us know — corrections are investigated and applied within 24 hours. For more context on how we work, see about and our full disclaimer.
Last reviewed: · By the What Can My Cat Eat? editorial team