I'm trying to figure out how to keep my lone cockerel from doing something similar. He was just given to me yesterday and he roamed the greenhouse all day, but showed no interest in the 2 x 4 that I put up for him to roost on, so I put him into a brooder on my back porch with a heat lamp last night. He's perched on the edge of his water bucket on the side away from the heat lamp this morning, so I'm guessing he'll probably be okay if I leave him in the greenhouse from now on, even if it is getting down into the teens at night.