Why
Corn is not toxic, but PetMD's veterinary guide says plainly that it is not a good choice for cats. Cats are obligate carnivores and rely on nutrients found in animal products. They have a harder time digesting carbohydrates, and corn is mostly carbohydrate. PetMD notes that corn which has not been thoroughly ground and heated, as it is in cat food, can be very difficult for cats to digest.
Given as a snack, corn adds calories without much benefit. PetMD's guide lists the downsides as high carbohydrate content that can contribute to weight gain, digestive upset such as vomiting, diarrhea or constipation in some cats, and the chance of a food sensitivity, although beef, fish and chicken are more common allergy triggers. Corn dishes can also contain onion, garlic, butter or cream.
The biggest risk is physical. A corn cob is hard and fibrous, and a chunk of cob can cause choking or an intestinal blockage in a cat. Husks are indigestible and rough. That is why this page says caution rather than yes.
Risks to watch for
- Corn cobs, which can cause choking or an intestinal blockage
- Husks and silk, which are indigestible and can irritate the gut
- Butter, salt, oil and seasoning on corn
- Creamed corn, corn chowder and corn casseroles, which may contain milk, sugar, onion or garlic
- Popcorn, corn chips, tortillas and cornbread, which add salt, fat or sugar and can be hard to digest
- Raw kernels, which are tough to digest
- Vomiting, diarrhea or constipation after eating corn
How to share safely
- Use plain fresh, frozen or canned corn with no salt, butter or seasoning.
- Cook it until soft by boiling or steaming. Raw kernels are hard for cats to digest.
- Cut the kernels off the cob, and throw the cob away in a bin your cat cannot open.
- Offer a few kernels on their own, or mash them lightly and stir them into your cat's usual wet food.
- Try a small amount first and watch for vomiting or changes in your cat's stools.
How much?
PetMD's veterinary guide recommends keeping it to less than 1 tablespoon of plain, cooked corn per week for a healthy adult cat. A few kernels are plenty for most cats.
Is corn in cat food bad for cats?
Corn appears on many cat food labels, and it is often described online as a cheap filler that cats cannot digest. The facts are more nuanced. PetMD's veterinary guide explains that corn in cat food is included as a source of energy, essential fatty acids, vitamins, minerals, antioxidants and some protein, and that it is ground and heated during processing so that cats can digest it.
What matters most is whether the food as a whole is complete and balanced for a cat's life stage and suits your individual cat. A cat food with corn in it is not the same as a bowl of corn on the cob. If your cat has a diagnosed food allergy or you are unsure about a food, ask your vet.
What if my cat chewed a corn cob or husk?
Pieces of cob and husk do not break down in the gut. A chunk of cob can lodge in the intestines, and husks can irritate the lining of the intestines as they pass, causing vomiting, diarrhea and belly pain. PetMD's veterinary guide advises calling your vet if your cat gnaws on a cob.
Do not try to make your cat vomit at home. Call your veterinarian for advice straight away, and get help urgently if you see:
- Repeated vomiting or retching
- Refusing food
- Lethargy or hiding
- A sore or tense belly
- No stools, or straining in the litter box
Corn plant is not corn
The houseplant sold as corn plant or cornstalk plant is not sweet corn at all. It is a type of Dracaena, and the ASPCA lists it as toxic to cats. Signs include vomiting, sometimes with blood, drooling, loss of appetite, depression and dilated pupils. If your cat chews a Dracaena, call your veterinarian.
Common questions
Is corn good for cats?
Only in limited ways. Corn is not toxic, but PetMD's veterinary guide says plainly that it is not a good choice for cats. Cats are obligate carnivores and rely on nutrients found in animal products.
Is corn bad for cats?
It can be. Risks to watch for: corn cobs, which can cause choking or an intestinal blockage; husks and silk, which are indigestible and can irritate the gut.
Are cats allowed to have corn?
Only in small amounts and the right form. Use plain fresh, frozen or canned corn with no salt, butter or seasoning.
Can cats eat popcorn?
It is best not to share it. Popcorn is usually salted and buttered, and PetMD's veterinary guide lists it among the processed corn products that can be hard for cats to digest or even dangerous. It adds nothing a cat needs.
Can cats eat corn tortillas or cornbread?
No. PetMD's veterinary guide advises against them because they are processed and often contain added salt, fat, sugar or spices that are not good for cats.
Sources
- PetMD. Can Cats Eat Corn? Benefits, Risks, and Feeding Tips (Sandra C. Mitchell, DVM, DABVP)
- ASPCA. Toxic and Non-Toxic Plant List: Corn Plant (Dracaena fragrans).
- ASPCA Animal Poison Control Center. People Foods to Avoid Feeding Your Pets.
- Cornell Feline Health Center. Feeding Your Cat.
If your cat has eaten something toxic, contact your veterinarian, an emergency animal hospital or an animal poison control service right away, even if your cat seems fine. Do not try to make your cat vomit at home.