How much mayonnaise for your cat?
Most guides say "a few pieces". Enter your cat's weight and get the actual daily ceiling, worked out from mayonnaise's calories and the 10%-of-daily-calories treat rule vets use.
Assumes a healthy, neutered adult at a stable weight, and that this is their only treat that day. Puppies, pregnant, very active or unwell pets need different amounts — ask your vet.
Why this verdict for cats
Mayonnaise is fatty and offers cats nothing. Non-toxic but best avoided.
🍽️ Feeding it safely?
Frequently asked questions
Can cats eat mayonnaise?
In moderation. Mayonnaise is fatty and offers cats nothing. Non-toxic but best avoided.
How much mayonnaise can cats have?
Recommended: Best avoided. When in doubt, ask your vet.
Is mayonnaise safe for dogs too?
Verdicts can differ between species. See the dog answer for mayonnaise →
More pantry & snack foods for cats
By the CanMyPet Editorial Team · Reviewed against ASPCA Animal Poison Control, the American Kennel Club (AKC) and Pet Poison Helpline · Last updated June 22, 2026.
Sources
- ASPCA — People Foods to Avoid Feeding Your Pets
- American Kennel Club — Dog Nutrition
- Pet Poison Helpline — Poison List