I am using the smart mare harmony on three mares right now. They are all better about being with each other and the other horses (5 mares & a gelding). One of the mares recieving this suppliment is a boss mare, she is still boss but her attitude isn't as bad. The other two that are on the smart mare harmony are my mom's mares I have with my herd. They are both doing better also. Not as many fights at feeding time or with each other and that used to be a big problem. I haven't seen the incredible results that some of the reviews give but it is helping all three of these girls out. I am noticing the longer I use it the better they get. Hope this info was helpful to you!