It would be helpful in our household of an 11-1/2 year old American Rat Terrier, a 3-1/3 year old Shorthaired Collie, and a 2 year old American Rat Terrier, to sort dog foods by additional choices. For example, we are looking for 5-star dry dog foods for a Senior, Reduced Fat, Small Breed dog, but to get to this level of discrimination requires a whole lot of reading and searching.