Just wanted to say thanks for all the replies! We seem to be on the right track- have started 1 lb. soaked alfalfa cubes AM and PM with his grain, aloe juice and tums before a ride, upped his hay even more and will soon be switching to all night turnout instead of just a few hours. Almost done with the ulcergard (only 10 days unfortunately) but have also started ranitidine today to ease the transition and I will keep him on daily ranitidine as long as he needs it. I haven't been riding too much, but from what I can tell the under saddle behaviors that made us suspect ulcers in the first place (pinned ears, tail swishing, reluctance to go forward and crow hopping/bucking) are definitely better, but not completely gone.