I have been told that if the cows are pasture fed (NO grains) the milk is better. Also, I have read that raw, pasture fed dairy is the best. Maybe Dr. O will chime in on this. I know in Michigan it is illegal to buy raw milk. There are ways to get it here, by leasing the cow, but it isn't easy to find these farms. Milk very much bothers me, but if I eat cheese it doesn't bother me so much. I try to eat it very very rarely.