We have 4 acres, but the only area that is not wooded is our yard. We have plenty of hawks, owls, raccoons, opussums, black snakes, dogs, coyotes, and on occasions bobcats. My coop is in an area where I cleared out the understory at the edge of the woods with large oaks and poplar trees fringing this area. Obviously, it would be dangerous to free range our chickens in this area. I want some breeds that may not be good at avoiding raptors (silkies for one). Originally, I had wanted to fence in a large run area. I don't think netting would work because of the ton of leaves that would fall on the netting in autumn. Tenting tarps probably not a good idea because of water pooling during rains. Yesterday a neighbor offered some used galvanized standing seam metal. I haven't seen it yet, but I'm thinking I'm probably better off to reduce the size of the run and use this metal with the exception of some narrower areas that I could criss-cross wth some sort of clothes line. Any other ideas or input? Are there any types of netting out there that are open enough to not collect leaves yet would keep out predators?