Second year with Chicks, and when the runt-ish chick of the group seemed to be missing feathers from her wing, then her back, we figured she was descending the pecking order and treated with some neosporin. But it was always a bit odd, since there was no blood. Now she's still the smallest, and her wings have feathered in OK, but her back has lost its down and hasn't feathered in. They're headed out to the coop soon, and I'm worried about this one. Thoughts?