Chicken in Shock?

I have a mixed flock of heavy breads and polish crested that are almost 6 months old. My white/black polish girls have been getting their top knots picked at. I had them separated until they re-feathered and then slowly re-introduced them into the flock. One has done great, but the other one was immediately iced. I pulled both of them out and put them into their tractor. Shortly after I found the picked at girl on her back with the other a top her making an awful squawking noise. (this was yesterday)

She has no obvious injuries. Doesn't seem to hurt anywhere when I palpate. She just sits on her hocks with her mouth open. Rarely makes noise. Won't eat/drink on her own. Will only stand for a few minutes and makes no effort to move around. I've been giving her water with solo-vit, pedialyte, and mixed vegetable baby food (low sugar, high protein) with a syringe every hour or so. She isn't getting better or worse.

The only vet in my area that sees poultry is out on sick leave. Any thoughts?