I’ve has my mare on it for about 2 months now for becuase she has ulcer like symptoms and I only rode her once while she was on it consistently and she was calmer and seemed more willing to work with me.she was also happier on the ground too so I was happy about that. Since I’ve been bad on my part and ran out she has started to get back to her old habits, unwilling to work, rushing work, and other such things. I’m putting her back on it as soon as I get the money for it. I definitely think it’s worth a try. If you do just get the smaller bag to try it out as it’s a 2 month supply, you can always take your horse off if doesn’t help. It is a powder and my horse is picky so I just add a little bit a of water to wet it and mix it up and we’re good to go!