I built a raised coop and enclosed run and a covered extension out of pallets and recycled wood (covered top to bottom with 1/2" and 1/4" hardware cloth) A 50 foot pallet fence goes from one end of the extension run to the other side of my yard. It all matches the Greenhouse I made out of pallets last year. Next year I hope to attach a 50 foot section of chicken tunnels along the inside of the pallet fence to protect them better. My family questions why I would do all this for 6 chickens. Admittedly its not the prettiest thing but we do the best we can with what we have, right?I went cheap on this run and did 2"x4" horse fencing with just 2 feet of hardware cloth around the bottom. Chicken wire top that had a few gaps prior to the owl invasion (none now). It's only about 15 feet from the house so that dissuades most large predatory mammals, and thankfully raccoons aren't an issue here. I felt very good about it before this happened, but alas, in the chicken biz you very often find you get what you paid for when it comes to the coop build.