Is a coop door necessary with an enclosed run? I am new to chickens. Getting prepared to build my first coop this spring. I have been looking at a lot of plans and designs and have settled on a coop and run all under one roof. I keep going back and forth between a manual door and an automatic door for the coop. The automatic door is my preference just in case we need to leave for the night. With having an enclosed run is an automatic coop door really necessary? If we were going to be gone for the night could the door to the coop just be left open?