Now that it's warmed up, I gave his hind end a medicated bath, including between his cheeks and cleaned his sheath. I then treated it again, but one of the lesson students at our barn suggested that maybe he has something like a yeast infection that itches so bad that he'll rub on anything he can. She was wondering if we could use a yeast infection cream on him. We've hotwired his stall because he was rubbing all the hair off his butt, and now he's figured out how to pull on his blanket to rub. I'd take his blanket off all together, but he's in a mare motel type building and while it's covered, it's not protected from the wind coming off the mountains.