I am new to chickens, we have 5 laying hens and twelve 6 week old pullets, the hens have stopped roosting in the coop at night. They are still laying in there but huddle up in a corner of the run and sleep there. We live in southern Louisiana and the weather is beginning to get hot, it's been averaging in the 70's at night. We thought maybe that was why they have begun sleeping outside. Any thoughts?