My (EE) broody blessed me with a whopping 13 bantam chicks yesterday. They're going to live on my front porch until the beginning of March, which gives me roughly 6wks to build them their own digs. I'm planning on converting a 4'x8' green-house (built out of PT 2x4's) into their own private coop & locating near the big coop & run set up. I'm playing with the idea of giving the bantams their own little "chute" with their own little bantam sized chicken door into the main run. Is there a door dimension that a bantam can fit though, but a normal sized chicken cant?