When I first got my 7 chickens they all slept in the nesting boxes in big huddles. 5 didn't matter, but Cleo and Amelia were always in the same box with no other chickens. One by one they started sleeping in the roost at the top of the coop. Cleo and Amelia too but they stayed on the opposite side. Cleo and Amelia are never away from each other even during the day. Today we introduced our 3 new chickens to the flock and all went well. I just went out to lock the run and here is what I found: the 3 new chickens in one nesting box, 1 chicken just outside that box on the floor, 1 chicken outside the coop on the ramp, 1 chicken in a box by herself, Cleo and 2 chickens in a box, and Amelia on the roost. What in the world happened? Why did Cleo and Amelia split up and why is only 1 of my old chickens roosting?