My first group of chicks are now 5 1/2 weeks old and my second group is 3 1/2 weeks old. The two groups have been in the coop for a week now doing great! The last two days I've noticed that one of my EE's back is getting feather picked. She is the only one with missing feathers from her back. I don't know who is picking her, or is she picking herself? She is the only one with missing feathers, she is pretty low on the pecking order but so are my Campine and Norwegian Jearhon and they aren't feather picked? Any ideas ?