We've gotten started on our coop, but haven't decided on a door yet. I'd like one that: 1. opens on the side and into the run 2. I can open and close from outside the run I'm just not sure how to work it - guillotine style, drop-down ladder style, opening to the side (like a real person door)...especially when it comes to closing it up for the night. This will be for a smallish chicken-tractor style coop. Thanks!