Hello, I'll start this by saying that I live in the desert near Albuquerque, New Mexico. Predators here are primarily coyotes, hawks, and owls, raccoons or foxes aren't an issue. I am also brand new to raising chickens. Now, I have 5 birds--4 pullets and 1 cockerel--in a 10x6 dog run/fence, and the coop is in the run with them. I cannot let them free range here because hawks are always flying nearby. The run is completely enclosed and my yard is surrounded by 7 ft tall block walls, so I'm not worried about predation but I am wondering if it is necessary to close them in their coop at night? I am NOT a morning person (in fact, I'm writing this at 2:15 am!). I've got my birds trained to go into the coop on their own at dusk and currently I do close them in, but I go back out in the middle of the night to (quietly) open it back up so they can be out with the sunrise. I'm questioning whether this is a vital daily task. Other than keeping them safe from predators (if that risk existed for me), is there any reason the coop door cannot stay open all night?