I have fed Oxy-Explosion to heifers, calves, bulls, and our mini horse that we show. I have never had any issues with it, I just never want to fork over the money for it right away. I raised my best bull on sure champ, animax, and our show ration. I can tell you that I know of people who use oxy-Explosion to all their show animals and have for a few years, they have never had any problems. Most of it is just vitamins. Good luck!