I have 4 chickens, and one, the Sizzle, since it started getting cold, is in the coop almost constantly. Will come out only briefly to eat and drink and then go right back in. My Serama is broody, so she is in the most of the time too. But when I open the nest box, the Sizzle is hunched way down in the hay, practically on top of the Serama, and acts just like a human or dog that is too cold. Doesn't want to move, almost as if she's sick. If I make her come out though, she acts fine, but goes back in at her soonest opportunity. It's been in the high thirties here at night, and breezy to windy. We have a tarp over the window in the coop for when the rain blows in that direction. I thought people on this board said chickens are fine in zero degree weather and even lower, but none of my four will come out often in the cold, and the one Sizzle, as I said, looks absolutely miserably cold, even while in the hay in the coop! Anyone else noticed their chickens are cold? I feel bad for her!