Ol Roy is sold by WM. It is super cheap and full of fillers and by-products...both are horrible!! By-products are the parts of animals that aren't used for anything else. This will include beaks, feathers, feet in chickens. It can also be the dead animals that have been euthanized by vets and collected, sent to rendering plants and made into meat by-products. Many times, the collars aren't even removed from the animals. The sick and diseased animals are also thrown into the batch. If in doubt, google rendering plants and you will find out what this dirty little secret is all about
My advise...throw it out!