Can Cats Eat Oatmeal?
By Pettings · Sources checked Nov 2, 2026
Cats can eat small amounts of plain cooked oatmeal. Oats are not on the ASPCA list of people foods to avoid, and Tufts Petfoodology explains that cats can digest properly cooked carbohydrates. A cat still has no need for oatmeal, since adult cats have no specific requirement for carbohydrate.
What Oatmeal Offers a Cat
Cooked oats are mostly starch and water, with some fiber and a little plant protein. The Cornell Feline Health Center describes cats as obligate carnivores that rely on nutrients found only in animal products, and oat protein does not replace them. A spoonful of oatmeal adds calories and a soft texture, not missing nutrients.
How Much Oatmeal Can a Cat Have?
For a 10-pound adult cat with no food allergy and no medical condition, about 1 teaspoon of plain cooked oatmeal is enough. That is a few calories. WSAVA advises keeping treats under 10% of a cat's daily calories, which works out to about 22 to 25 treat calories a day for an adult cat of roughly 9 to 11 pounds. A teaspoon fits inside that allowance, as long as it replaces a little of the day's food instead of being added on top.
Oatmeal is starchy, so larger servings can push a cat's calories up without much nutrition. Kittens, seniors and cats with diabetes, kidney disease, urinary stones, pancreatitis or food allergies should only get oatmeal if your veterinarian agrees. Tufts notes that reducing carbohydrate can improve diabetic control in cats, though it is not the best approach for every cat.
How to Serve It
Use plain rolled or steel-cut oats and cook them in water until soft. Do not add salt, sugar, butter, honey or syrup. Let the oatmeal cool to room temperature and offer a teaspoon on its own.
Skip milk. The ASPCA notes that pets have little of the enzyme needed to digest lactose, and the Cornell Feline Health Center says many cats are lactose-intolerant. Cook the oats in water instead.
Flavored instant packets are a different product from plain oats. They usually contain sugar and flavorings, and many varieties include raisins, chocolate or nuts. The ASPCA lists raisins, chocolate and nuts among foods to avoid for pets, and the Merck Veterinary Manual reports anecdotal kidney failure in cats that ate grapes or raisins. Some reduced-sugar products use sweeteners such as xylitol, which the ASPCA also warns about. Oatmeal cookies, granola and overnight oats made with yogurt or fruit fall into the same group. If you want to share, make a plain spoonful just for your cat.
Raw dry oats are harder to digest, so cook them first.
If your cat has a medical condition or eats a special diet, ask your veterinarian before offering oatmeal.
Common Questions
Can cats eat instant oatmeal packets?
It is better not to share flavored instant packets. Most contain sugar and flavorings, and many varieties add raisins, chocolate or nuts, which the ASPCA lists among foods to avoid for pets. Some lower-sugar packets use sweeteners such as xylitol. If you want to give oatmeal, cook plain oats in water and offer a teaspoon with nothing added.
Can cats eat oatmeal with milk?
Make your cat's portion with water instead. The ASPCA notes that pets have little lactase, the enzyme that digests lactose, so milk can cause diarrhea or other digestive upset. The Cornell Feline Health Center also says many cats are lactose-intolerant. A lick of milky oatmeal is unlikely to cause more than a mild upset, but plain oats in water are the better choice.
Can cats eat raw oats?
Cooked oats are the better choice. Raw rolled oats are dry and harder for a cat to digest, and Tufts Petfoodology refers to cats digesting properly cooked carbohydrates. A few dry flakes licked from the counter are unlikely to cause problems. If you want to share, cook plain oats in water, let them cool and offer about a teaspoon.
Can kittens eat oatmeal?
Kittens are better off sticking to a complete kitten food. Their stomachs are small and they need every bite for growth, and new foods can bring on diarrhea in kittens. A tiny lick of plain cooked oatmeal is not a concern, but there is no reason to add it on purpose. Ask your veterinarian before giving a kitten any human food.
Is oatmeal good for cats with constipation?
Oatmeal is not a recognized treatment for constipation in cats. The Cornell Feline Health Center says vets manage constipation with diet changes such as added fiber, along with hydration and sometimes medication, and that too much of the wrong fiber can cause problems. A constipated cat should see a veterinarian, who can choose the right fiber source and amount.