feathers??? fur??? lol.. You really do not understand raw I would guess. You do know that commercial diets can include- beaks, feathers, cancerious tumors, hide- etc and AFCO will call it protein. As stated- you can make 25 percent protein and 15 percent fat by soaking beef hide- with oil..
Given that option- no thank you- I feed raw- I KNOW what goes in the bowl- piece by piece-.. No puzzles I have to worry about..
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Reachoutrescue- my vet also promotes raw diet as well.. And makes a joke " even if that means I only see you once a year for the heartworm test- at least they are healthy..