I have buff brahmas that are about 7 weeks old now. We kept them inside until about 4 weeks old then moved them out into the coop we built for them. we now let them out into the run in the mornings and put them back into the coop when the sun starts to set. when we put them in the coop they all huddle up against the wall in a big pile making all sorts of crazy noise. They stay in a pile through the night. they are fully feathered so I wouldn't think they are cold but that is sort of how they are acting, except different. I don't want them to be unhappy in the coop! Could this just be from them not being able to go in the coop by them selfs or because it is dark?