When we were designing a run to protect our girls from a hawk, I was desperate for ideas. Now I hope that sharing might help someone else. We already had two small coops with nesting boxes already inside an enclosure on the side of the house. We enclosed the rest of that side yard. It's not quite as predator proof, due to sprinklers and the AC and other access issues. So there's a door between the two parts to keep the girls safe when they sleep.