http://www.nutrenaworld.com/products/poultry/naturewise-poultry/feather-fixer/
Read all about it on their site. There have been a few threads here on it and the feedback is a bit mixed. Some people like it well enough. By studying the contents list, most of the "ingredient gurus" here on BYC feel the secret sauce is likely DE.
I doubt NatureWise is into animal protein.
Much to the dismay of many, I do NOT see DE as an effective product for mites. Sorry