Hello, I have a white leghorn who is acting unusual. She is not leaving the coop and every time I look she is still on the perch in the same location. Her red comb is now turning black on the ends and maybe getting deeper into the comb. We have had freezing weather yet no other hens are experiencing this except my black Australorp hen has always had black in her comb much as the one in some previous posts. The white Leghorn is also sitting on the perch inside the coop and doesn't seem to come out. I don't know if she eats because food is inside the coop and I've not seen her drink water which is outside the coop. I just haven't caught her outside the coop now for several days, although I can't see the coop yard from most windows. She responds to me and seems to poop okay. When I stroke her she seems okay with it...which usually she's rather shy but she isn't acting strange other than not coming out of the coop and the black on her comb. Does anyone have any ideas as to whether she is going through a normal stage or if she's sick? Some of them have been molting and she did too but not extreme. The others are all going outside and acting normal. I have 6 hens. It's winter here and cold at night on some nights below 32 but not every night. Any suggestions and help would be greatly appreciated!