I live in an area with a ton of hawks and owls, so there is no way I could have an open top, I started with netting and a hawks went through it. (RIP Varly chick). Now I have hardware cloth, and chicken wire covered with tarps. Chain link fence, with hardware cloth inside and electric out.
Are there really areas that don't have to worry about attacks from above?
Are there really areas that don't have to worry about attacks from above?