I have a new pen for my chickens 20'x25' it's 7' tall and very sturdy. The top is open and I'm debating about how to cover it. There are 3 trees in the middle of the pen that don't really give too much protection at this point. I live in Tucson, AZ and the worst predators here are bobcats, coyotes, harris hawks, owls, and mountain lions. I was thinking about some sort of netting over the top (something that could go over the trees too). My old coop is very small and secure but want I wanted them to have more space and I also want to add more hens...I only have 4 hens right now. I'd appreciate any advice. I put my girls in it today for the first time and they loved it! I only let them in there a couple hours though...I'm too nervous about the top being open.