I have been trying to find out what Animal Digest exactly is and what animals are the digest from? My husband got a sample of Nature's Recipe Farm Stand Select (a product of Del Monte, maker of kibbles'n'bits). I was looking at the ingredient list and noticed that it contains Animal Digest. I didn't get any clear response from Nature's Recipe email reply other than something about "clean rendered animal tissues...."
Nature's Recipe Farm Stand Select claims to contain no beef, corn, or soy (or is it wheat?), but.........cows can be in the so called Animal Digest.
P.S. I checked the prices and, wow, they are quite expensive. I personally think that I would get more for my money on products like Orijen, Innova EVO, and etc than I would on Nature's Recipe.