Cats can eat oats, including oatmeal, and it is generally safe for them. Oats are even included in some commercial cat foods and provide nutrients like protein, fiber, vitamins, and antioxidants. However, oats should only be given in small amounts as an occasional treat because cats are obligate carnivores and need a diet primarily based on animal protein. Cooking oats with water (not milk) is best since many cats are lactose intolerant. Avoid adding sugar, spices, or other additives that might be harmful to cats. Overall, oats can be a healthy supplement but not a dietary staple for cats.