My horse has struggled with ulcers as well. He is on U-Guard pellets as well as SmartGut Ultra. I also give him a small amount of a complete feed, and he gets beet pulp(soaked) which seems to help his stomach. He is also out on grass all day which I know is difficult for a lot of people to find for their horses. If your horse can’t be out all day, it really does help if you provide hay frequently, even if it is a pain. The Smartpak people are very helpful as well and most importantly, ask your vet who knows your horse, knows the feed you give and the environment your horse is in for the best treatment. Good Luck.