Hello, one of my chickens is very listless. She won't run around like the others. (They are part-time free range and part time in coop). She just lies around. She does eat, it seems. But she has no energy. I'm not sure if she is laying. She is only about 7 months old. Any ideas? I plan to try and take her to a vet, if there is one that sees chickens around here, tomorrow (Monday). In the meantime though, I am very concerned about her.