[theBCnut]

As far as using whole carcass grinds, the fur and feathers are not digested. In dogs, they act as fiber, and help to keep everything moving through the digestive tract. All the digestive enzymes that are needed are in there naturally. Some dogs need digestive enzymes added when eating a kibble diet, but unless you have a dog with EPI or some like disease, you should not need to add digestive enzymes to raw, because there are enzymes in all raw meat. Cooking and processing destroys a lot of them.