I just read on someone else's thread that their roo was all puffed up in the cold weather and s/he was worried. Mine are always puffed at night and I thought it was their way of keeping warm. Does this mean they are not tolerating the cold well? It has been near 0 at night and 20's in the day. They won't go outside as there is a little bit of snow although I try to get them to. I do not have a heat lamp in there. I tried their red brooder light and it seemed to keep them up. They would be walking around at 10 pm. so I turned it off. They haven't had it for awhile.