I don't really have a lot of experience with these but it kind of seems like that's what Jasper has. This morning I noticed a few tufts of hair were out of place on his hip and that he was biting and licking at the area a lot, which is weird because he's not usually very itchy. After parting the disheveled hair, I noticed the skin underneath looks kind of raw and slimy and the hair looks a little thin. It was hard to get a good picture of it, but I'll probably take him to the vet tomorrow...just wanted to see if anyone had any opinions or experience with it.
This is the best picture I could get (Warning: Pretty gross)