It's very hot here so I can understand them not wanting to be in the coop but even when I provide places for them to roost, they prefer to pile up on teh ground. It's getting cooler here and they still pile on the ground! I have 4 dark brahmas, one pullet, 3 cockerals. I'm going to have to do something about that obviously but for now they all get along fine. They are about 3 months old, not sure exactly but the are not small things. They go in their coop in the afternoon so I know that they are familier with it. I was shutting them up but have since quit doing that. My run is now impermialbe to all but the smaller things like rats so I don't bother. They didn't even roost when I put them in it, they just piled up in the litter! I had a sawhorse in the run with a 2x4 under it suspended. I had it in the garden and they would roost there for a few moments taking a break from bug eating. ARe they just too young to roost? After I get back from a trip I'm going to try and get some more hens while I still have the young roos. Then when they are all socialized I won't have to worry about lonely chickens.