Can pets eat Mayonnaise?

What Pet Owners Should Know About Mayonnaise

Mayonnaise falls under the other foods category in our pet food safety database. For dogs, mayonnaise is rated as unsafe, with a recommended portion of none. For cats, the same food is rated unsafe, 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 very high fat and high calorie, which is why portion and preparation instructions matter more than the food itself. For cats, watch for very high fat and pancreatitis 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 mayonnaise covering warning signs, emergency steps, and cross-reference data. 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.