I don't think anyone addressed the hind gut ulcer question for you. My horse is a chestnut TB mare who definitely internalizes stress and is very ulcer prone. She gets gastric ulcers and hind gut ulcers. A recent study showed that almost all horses with gastric ulcers had hind gut ulcers (although the reverse was not true). Hind gut ulcers cannot be treated by omeprazole. Succeed is a supplement aimed at hind gut ulcers, but it is rather expensive, IIRC. One of the main ingredients of Succeed is oat flour and this is what I use. You can grind you own oats or you can just buy oat flour in your local health food store. I feed 1/4 cup each day, my horse eats is no problem, and it has made a big different in her girthiness and a few other symptoms that were responding to omeprazole. A 6-week supply costs me less than $5 at my local health food store, so it is hardly an expensive "treatment"! Good luck.
leheath, thank you for explaining that to me. He currently is on a Purina suppliment which is called Pure-A-Yeast.
I will definitely look into this oat flour as I think this will help. Thank you again!!
He already seems happier with the much much longer turn out now that he is home, but I am still going to look into this