I have one lonely Serama roo, Tweet, and I'm afraid he may get trampled by the Maran roo and the Mallards. So I'm thinking about making a small coop for him. I'm thinking maybe just a simple house with a door, leading into a run? I'm looking for any tips on building a small coop, anything at all, I've built many chicken feeders and such, but never a coop. Any advice?