I've been told that prior to antibiotics farmers fed their chickens raw milk to keep their GI tract healthy and avoid coccidiosis. Same general idea, I think..... the living enzymes in raw milk improve health. I feed my babies raw milk 2X a week, and my hens get all the soured raw milk - they just love it! (Note - raw milk is completely different than pasteurized milk, I wouldn't bother looking for health benefits from the pasteurized stuff, the cooking kills all of the living enzymes) But for those of you who have a goat or cow, or access to raw milk, it's worth considering.