I am worried about my hen at the bottom (Misty). The top chick ( Shanane) won't let her eat. It isn't even that Shanane is aggressive, sure a few pecks now and then, but the second Misty tries to eat, Shanane makes a squawk and Misty stops eating. I just watched the others feed for an hour and Misty isolates herself and preens her feathers. That is, if I lock them all out of the coop and into the run. If I do not lock up the coop, Misty stays inside. I at first thought this was because she was broody. Now I am not sure if she is being broody and isolating herself. Any thoughts?