So I have 4 birds with an 8x8 run connected to their coop. It is secure. Do I need to close the coop door every night during the warm months? Or can I just let them go in and out as they please? Right now they go in at dark and I go out, open the run door, close the coop door and then close the run door.then repeat it in the morning. I think they would be fine with the coop door itself open since the run door is secure. Am I wrong?