Anything it wants...meat, fish, cheese, milk and cat food. Lots of water too. Most cats are picky and will only eat what they want. ADD: Cow's milk isn't very safe. Some cat … s are lactose intolerant and milk can make them sick.If your cat is okay with milk, only give a very tiny amount (same goes with other dairy products like cheese).es, it is okay for a cat to have a few peanuts. As is true with dogs, although macadamia nuts are toxic to them, peanuts are okay. That is why they can have peanut butter I suppose. However, my worry would be with a cat or a dog eating peanuts, that they could get caught in their throats.