My chicks do the same......they are all together on one roost, squished in tight even when it's hot. I'm glad they coexist so well and I'm really glad because I'm adding some new chickens to the flock, so they can have the other roost! They do the same with the nest boxes.....have 2 for 6 chickens and they pretty much use 1. I'm glad we didn't build more......
