The answer is different for each pet, although many commercially available foods are fine to feed healthy dogs and cats. You can look for a nutritional adequacy statement from the Association of American Feed Control Officials (AAFCO), as well as the words “complete and balanced” and “feeding trial.” Pets’ nutritional needs do change, depending on their life stage and health so a food developed for “all life stages” is generally inappropriate. Your veterinarian can recommend a pet food, as well as give you advice on deciphering ingredient lists and determining how much to feed your pet.