Oh youll get no argument from me on the fact that predatory birds hammer prey birds! Some regions are different then others as well. Where I am, upland birds are not as common. Hawks and owls still are, though. Rodents are the top table fare here. I dont know why guys who have birds of prey problems dont double net the tops of their flight pens. I know that stuff is pricey, but a canopy that stretches across the top and above the containment netting would discourage those net zappers, because of the buffer zone inbetween. Then those hawks and owls can do what they are supposed to do, and clean up all the mice and rats that feed on the waste feed around the pens. KShunter, I think youll chuckle when I describe this...every bird breeder I know has a tall pole with a barely visible jaw trap stapled to the top. When asked of the obvious, they to a man reply that its for ...raccoons! Hahaha, so it goes!