I have two I have on probios. It has worked wonders for us. One of our girls, Valley had terrible digestion problems to the point of those huge cow patty type splatter poos. After about a week she had PERFECT poos. I kept her on it for about two weeks, twice a day. For whatever reason I didn't get more after the second week. Its been over two months and her poos are still perfect. I get it at Tractor supply in the horse supplement section, but it says on the package for dogs, cats, cows, goats, everything.