I went out yesterday and Solomons right butt cheek was bare! It had to have happened over a course of three days. He looked in perfect condition the last time I was out three days ago. But oh my gosh! The hair was just falling off in clumps. It was scabby and dry under but the weird thing was there was already baby hairs growing in to replace the hairs that were falling out. He is not rubbing his tail, and it is only on that one side. I'll see if I can get a picture, it is quite large, about the size of my hand maybe a little larger. My barn manager wondered if he rolled into nettles or a plant that irritated his skin because it was in only ONE spot and scabby. I know he rubbed the hair off because there was a section about in the middle of the rub where the hair was still intact, like he had been rubbing on the boards in his stall and that hair fell between the crack so it didn't get rubbed off.
What could this be? I'm very worried.