Can pets eat Walnut?

What Pet Owners Should Know About Walnut

Walnut falls under the nuts & seeds category in our pet food safety database. For dogs, walnut is rated as toxic, with a recommended portion of none. For cats, the same food is rated toxic, with a suggested portion of none. Ratings in our database are anchored to veterinary toxicology references, ASPCA Animal Poison Control guidance, and peer-reviewed nutrition research, not anecdotal reports, so pet owners can make decisions based on the same evidence a vet would cite in clinic.

Dog- and cat-specific reactions to the same food can differ significantly because of metabolic differences between the two species. Known risks for dogs include black walnuts contain juglone — highly toxic and other walnuts can harbor mold, which is why portion and preparation instructions matter more than the food itself. For cats, watch for juglone toxic and mold risk. When a pet food is rated caution or unsafe, the rating typically reflects either a compound that is marginally tolerated in small amounts, a preparation step (cooking, removing pits, peeling) that transforms risk, or a quantity threshold above which gastrointestinal distress or organ stress becomes likely.

This page links out to species-specific full guides for walnut covering warning signs, emergency steps, and cross-reference data. Dogs exhibiting symptoms such as tremors, seizures, gi upset, vomiting after exposure should be seen by a vet immediately. For cats, the symptoms to watch for are neurological signs. If your pet has consumed a large amount of any food rated caution or worse, the ASPCA Animal Poison Control hotline at 888-426-4435 operates 24/7. Use the dog and cat cards below to move from this overview into the detailed safety, portion, preparation, and risk data for your specific pet.