There are many different types of food available for your pet, and each has its own benefits. You should ask your vet which particular food is best for your pet. The food your pet eats depends on their age, size, breed as well as other factors. If your pet has a health condition such as kidney disease, heart disease, cancer, stomach ailments, or obesity there are prescription diets available to help them combat their ailment. Your vet has extensive knowledge on this subject and can prescribe the best food for your pet.