and aside from its energy content, this grain is of only modest nutritional value to a dog. even though meat and bone meals are still considered protein-rich meat concentrates, we do not consider a generic ingredient like this to be a quality item. the fifth ingredient is chicken by-product meal, a dry rendered product of slaughterhouse waste. animal fat is a generic by-product of rendering, the same high-temperature process used to make meat meals. the eighth ingredient is corn gluten …