It has worked wonders!"When we first bought my daughters WB gelding he was under weight and very temperamental and hot. We tried mag e with no luck, and I started to wonder whether he had ulcers. We started him on comfort gut. It took a month to see any difference, but it has worked wonders. He has put on weight, his temperament is heaps quieter, and we can now get a decent dressage test out of him. He was off it for a week over Xmas ( as the mail was late with his next tub) and within days he was back to being difficult again. I can't praise this stuff enough! It's made a huge difference" Samantha Schmehl, Jindera