I came home today to one of my three hens seeming disoriented and out of touch. She stayed up in the coop and did not come down into the run. When she tried to walk, she makes it 5 feet before losing her balance. She seems to just lie down wherever she is and the others just leave her alone. She was drinking on her own (not sure about eating). When I picked her up there were no injuries but she did regurgitate some bile. I'm thinking maybe a concussion? My concern is that one of my other hens is in the middle of raising now-week-old chicks and I don't want them to get sick!