This morning we found one of the girls laying on the bottom of the coop floor. She cannot walk. She is a year old EE. She is unable to stand and is on her butt with her legs sticking straight out. Her comb is oddly bright red, super bright red. I have her separated. I dont know if she was vaccinated as a chick. She is from Ideal via a local feed store. If she has mareks, what can i do for the rest of my flock? I have 7 other hens and 2 week old chicks which are not with the flock yet. Thanks!