Gang, go look up EquiOtic and watch the video. My vet just turned me onto it. He does alot of trials for the clinics in Lexington, KY. This is a new technology in which they actually take a bacteria from the horse. This is the first time it has been done in strength. We have one horse on the barn started on it and the owner says that the horse is not as uncomfortable. I watched the video and read the research on the website and it seems pretty straight forward. The guy that developed it I do know is one of the top equine internists in the country. So far, so good. I had no idea how probiotics really worked or didn't until I read the studies.