I have two buff orpingtons and 2 americaunas or easter eggers, not sure which. They are all 23 weeks old. The buffs have been laying for a couple weeks. I got one greenish/bluish egg last week, then nothing. Right after the egg the ee's (easier) started getting extra fluffy feathers at their back above the tails. Now the one is bloody, guessing from picking by the buffs. I saw a couple of pickings but nothing excessive. I put medicated cover up and more blood the next day. I separated her from the rest. That afternoon it seemed the other ee was getting the same thing, only no blood. I put the two together away from the buffs. They are very stressed out. I know molting is stressful, so not sure if I am making things worse. The skin is very dry where the feathers are missing. I was wondering how to tell if it is a parasite. Thanks for any advice.