I found STRANGE clots of hair between his saddle area and left hip. I also found some clustered in a very small area on his left rump and just a couple stray clots on his right shoulder. I"M TERRIFIED because with a gentle tug at them they come out entirely, hair and skin, leaving what looks like raw skin underneath. There is no blood. However there is pus (at least I think its pus). My horse does not seem to notice when I touch them, pull them out, or even press on the raw skin after. It is very localized in the areas I mentioned-- in other places his skin and hair is fine. His demeanor is normal.
DOES ANYONE KNOW WHAT IS GOING ON?