I've read a couple of posts about roost size and shape, and I'm beginning to suspect that mine is not the best. My chicks are anywhere between 5 and 7 months old, and the roost they're on at night is about 1 1/2 inches in diameter, maybe less. I've always thought that it should be like a tree branch, so that they can curl their feet around it, but possibly I'm totally wrong about that? Since it gets cold at night now, should I switch it to something they can sit on, like a 2x4, so that their feet are resting under the down?