One of my hens has been spending a lot of time in the nesting box. She's been in there for 2 days now, i've taken her out a couple of times as i thought she might be broody. I just picked her up to check if she could be egg bound and noticed her breastbone is red and lacking in feathers. She doesn't seem to be missing feathers anywhere else. There is also dark brown watery poo in the coop but i'm not sure if it's hers or someone elses. She hasn't layed for about a week, but neither have the other chickens. I think they've been stressed out by the new cockrel. Any advice?!