I just purchased 7 new hens, to go with my other 7 hens. I added them to the roost at night, which when I received them, in morning let all out to play, all fine. Problem is only 2 came back in coop at night. In morning I seen some of the remaining not in coop, they were under the spruce trees. Question, will they ever come to the coop with the others? And ate they laying somewhere else and setting. They are red Stars 18 months old. Help, never encountered this before. I cannot reach them in the trees but sll on ground, I think