My 8 chicks are almost 3 months old. I have recently combined them in the coop with my two hens. I thought that once they were in there they would begin to roost at night, but they still just pile up on each other in the corner of the coop(in the droppings pit ). I didn't think that I would need to show them how to roost. In fact, I actually put one of our young roos in with the hens a week before the others went in, and he began to roost at night with the hens. Once I combined them all though, he went right back to sleeping on the floor with the others. What gives?