I have two roosts in my small coop. Both are close enough to the roof that my three hens and one rooster have to crouch. They are also at the same height as the open vents on either side. So far they seem happy, and huddle next to one of the window vents. But I am concerned that 1) they should have more headroom (especially the rooster?), and 2) they should roost below the window when winter comes. If the headroom is not a problem, can I solve the second by dropping a clear plastic flap over one of the vents at night? The coop has enough cracks that I'm not very worried about ventilation.