So I noticed that my horse was losing hair on his haunch (is that the right word?) but didn't think anything of it, I figured it was probably him pulling out winter fur before the spring coat could come in. Anyway, this morning I went out & the skin was pink & looked like it does in the picture attached. There are also little scabby bald patches.
I'm curious as to what could be wrong. It doesn't seem to bother him and he let me pock at it & check it out no problem.