I have two Rhode Island reds, one black Australorp and one light brahma. The reds I have raised from chicks and the other two were recently transplanted. All are same age. Even though my reds are smaller they have higher pecking order. My question is about how they sleep. I have an a-frame tractor with an enclosed roost area over nesting boxes on one end of the coop. My reds have always slept in the roost but the new birds typically don't. They will typically sleep on the ground even though they go in an out of the roost during the day, and all hens lay in the roost despite my trying everything to get them to lay in the nesting boxes. There is plenty of room in the roost for all four. Could the pecking order be driving this sleeping behavior? Or, the fact that they are only two weeks into the transplant?Complicating this is that there is a light on the outer part of the coop for warmth/light (I'm in cincinnati)...could they just be sleeping under the light on purpose? Thanks!