So, I'm looking to convert an old workshop on my property for use as a chicken coop. Will need to add a chicken door on the yard side wall, cover the window with some strong wire mesh so I can leave it open, add roosts, droppings pans, and some nesting boxes. Is there anything I'm forgetting? Do I need I need to build a fenced off run for them or would it be safe to let them roam the backyard (fenced) while I'm at work during the day? I'm on only about 1/4 of an acre. Are there pre fab chicken door kits that can be added to existing structures? Or good blue prints? Thanks in advance for any advice.