Why?
Corn kernels are mostly starch, with a little plant protein and fiber. You'll find corn in some cat foods, but cats don't need it: their bodies are built to run on animal protein and fat. The kernel's outer skin is poorly digested, and the cob is a real hazard: chewed and swallowed, it doesn't break down and can cause an intestinal blockage.
How much?
A few plain cooked kernels, once in a while. Rinse canned corn, which is often salted or sweetened, skip buttered corn, and never leave a chewed cob within reach, even in the trash.
The risks
- Intestinal blockage if a piece of cob is swallowed
- Repeated vomiting, painful belly, loss of appetite
- Soft stools or gas if the portion is too big
- Salty, sweet or buttered popcorn, and unpopped kernels
Your cat ate some: what now?
A few kernels of corn are no problem. If your cat swallowed a piece of cob, call your vet right away, even if it seems fine: a blockage can develop over the following hours or days. Also watch for vomiting, no stools and loss of appetite.
Better options
Cooked peas and green beans are easier to share. And for movie night, a cat treat makes a much better stand-in for popcorn.
Common questions
Can cats eat popcorn?
A few pieces of plain, air-popped popcorn with no salt or butter aren't toxic. But unpopped kernels can damage teeth or get stuck, and movie-theater popcorn is far too salty or sweet, so it's best skipped.
Can cats eat corn on the cob?
Not the cob itself. Cats can chew off chunks that their gut can't digest, which can cause a blockage needing surgery. Cut a few kernels off for them instead.
This information is general and does not replace advice from a veterinarian. If your cat has swallowed something toxic, call your vet or an animal poison control center right away, without waiting for symptoms.