My chickens are 6 months old. Everything has been going great til yesterday. I'm new at raising chickens. This is my first flock. Yesterday I noticed one girl was laying around. Today she won't get up. She breathing really hard, eyes closed and her head is on the ground. I took her out of the coop and brought her inside. We have no vets in the area that see chickens. Please someone help. I don't know what to do.