I noticed by Delaware roo (15 moths) lies down a lot but generally eats and drinks normally. I figured the lying down is related to it being low on the pecking order. I decided to check him out and noticed this around the vent area. Its seems like when I expose the skin, they seem to run and hide. My buff orp also has them so i separated them. Is this mites. any recommendations on what do do? This thread shows where he lying down: https://www.backyardchickens.com/t/827190/delaware-roo-or-hen I'm starting to realize chicken keeping is harder than I thought!!