Because dog foods are bought by people, dog food suppliers market to the ideas dog owners have about their dogs likes. This explains why dog foods come in different shapes and colors, with or without gravy, dry or moist, etc. Dogs do not need any of these things for the best all natural dog foods. Isn’t it interesting that pet owners spend around $13 billion annually for pet food which the majority of these dog foods are not all natural dog foods that give your dog optimum health.