Hide/hair and feathers have virtually nothing to do with nutrition.
They are, instead, what *nature* uses to move all the bone shards and splinters out of a dog with no harm.
*Whole* raw food is what ‘wild dogs’ eat and deviating from that is unwise in the extreme.
The new raw fad is extremely dangerous.
I know a lot of people who stopped raw only after massive surgery bills and/or dead dogs.
I would suspect they were feeding raw meaty bones to an excessive extent or were feeding to dogs who “gulped”. There is nothing to fear from feeding raw. When I see dogs cooking their food to death over a fire — then I’ll start to worry! Dogs have a short digestive system (as I’m sure you know) — and everything gets a nice acid bath before being digested. Salmonella and other bacteria are not a problem — unless the dog is severely immune-compromised. It’s sad the amount of disinformation that people have been told by way of the PFI and those vets which shill for them. There is nothing “dangerous” about feeding a species-appropriate food and everything to gain. Of course, it needs to be balanced and done correctly, but that’s true with most things. Raw bones are rarely a problem — but if one feeds hard herbivore bones unsupervised they can fracture teeth. Likewise if the animal does not know how to chew a bone and “gulps” it, that’s where the problems begin (or if they are fed cooked bones). I taught my Chow how to chew any bony meats — holding one end and forcing him to chew it up as he went. Yes, the skin is still on it. He does fine on them, but they are usually fed with muscle and organ meat. It’s the only 100 year old tradition of kibble which is the “fad” and it’s done irreparable harm to domestic animals: increased instances of chronic and fatal illnesses, increased UTI and kidney diseases, allergies, cancers, weakened immune systems, dehydration, obesity and rotten teeth to name but a few.