Ok, so I have a black australorp chick named Annie who is about a month and a week old now. I moved her outside to the coop about two weeks ago with her three flock mates. But, for the past weeks she has been losing some feathers, but acting normally. She is always eating, drinking, and pooping. Annie is flying around with the other chicks happily, and has acted completely the same as she always had. But, she has patches where there are no feathers, and when she flies around, feathers practically fall off. I held her to look at her skin patches up close and the skin looked normal, except for one thing. There seemed to be a little bubble underneath the skin near the base of her neck. I pressed it (she didn't act like it hurt) and it moved around, as if it was filled with either air or water or something. Btw, the patches were her feathers are missing are on the sides of her neck, partially chest, and underneath the wings. And, out of the four chickens, she is the very top of the flock so I doubt she is being picked on. ^^^The left side of her neck^^^ ^^^The right side of her neck^^^ ^^^The right side of her neck^^^ ^^^The right side of her neck^^^ ^^^The right side of her body/chest^^^ ^^^Underneath her right wing^^^ ^^^Underneath her right wing^^^ (Underneath her left wing looks the same) If anyone could help, I would much appreciate it! Thank you so much.