We are in need of suggestions for the chicken door. What works and what doesn't. Anything you wish you would've done differently. I know some of you have it open upward and some from side to side. If the door is in the pen how do you open and close it and even though it's in the pen how do you lock it. Also I do think we already made one error with the door and that's the size of the opening-it's 12 x 12. I think the girls will have to duck their heads to get in.