Turkey by-product meal is much less expensive and less digestible than turkey meal, and is made from non-rendered, clean parts, other than MEAT, derived from slaughtered animals, produced in the course of making a primary food ingredient. It includes, but is not limited to, lungs, necks, spleen, kidneys, brain, livers, blood, bone, partially defatted low temperature fatty tissue, stomachs, undeveloped eggs, intestines freed of their contents. It does not include hair, horns, teeth, and hoofs, except in such amounts as might occur unavoidably in good processing practices. By-product = NO measurable amount of meat/skeletal muscle. Where's the meat? And where's the assurance that they are practicing "good processing"? (Dr. Corrine Chapman)