Most commercial feeds use fish meal derived from whole fish, fatty fish, such as herring, sardines, menhaden, etc. In fact, the vast majority of the industries fish meal is made up from whole fish. The value is based on the quality, as in protein level, of the finished product.
Really? I would have thought it would have been offcuts and scrap for the majority of manufacturers. Especially the cheaper brands.
Probably better quality protein in my fish food than the meat pie i had for dinner last night!