Does my cat need grain-free cat food? Cats are carnivores and thus need a lot of meat or fish. They do not necessarily need grain-free cat food (unless they are allergic), but there should be no more grains than meat/fish in the food and your cat should get all the nutrients it needs. WIJ MEER TIPS Featured • Cat Why grain-free cat food? Featured • Cat What types of hypoallergenic cat food are there? Featured • Cat What is the best cat food?