Hi, The temperature here in Sweden is starting to drop really quickly. I have five chickens and one of them that is in the lowest of the pecking order doesn't roost with the others during the night. He sits on the roosting pole just below them even though there are plenty of space and he is all fluffed up and seems to freeze! What should I do? Should I put him up there with the others, risking him to be picked on or..?