Originally Posted by emb_78
I am assuming that is a filler???
by-products are just a poor source of anything in my opinion. If one were truly talking a mouse and all it's parts, there are indeed benefits to your cat from all those parts, but by-products are not fresh, juicy organs, they are defined by AAFCO as: "ground, rendered, clean parts of the carcass of slaughtered chicken, such as necks, feet, undeveloped eggs and intestines, exclusive of feathers, except in such amounts as might occur unavoidable in good processing practice.â€ I could see a bit of benefit from ground bone, any meat left on the neck, but not from feet, the occasional feather.