I have the base finished for my chicken coop. It is mounted on 4x4s. I have a question about the chicken door. Who has a automatic door? I work 12 hour rotating shift work and can't always be home to open it in the morning and close it in the evening. Do they work well? Do I really need to have the door closed as soon as dawn gets there and the door opened as soon as the sun comes up? Thanks for the help. I have no experience with chickens.