—Donna Sharlon, Mayflower, Arkansas Actually, you can! Tasty “meal replacement” bars and shakes are popular. But I can’t imagine living on them, nor are they formulated for that purpose. And few of us would want to eat even a wide variety of kibble and canned mixtures (like dog and cat food) day after day. Or how about emergency rations that provide complete nutrition for the military? Ugh! By the way, cooking for your dearly loved dog or cat may be enjoyable and perfectly fine now and then, but he or she will get the best nutrition from high-quality commercial pet food.