I will have 49 hens and possibly a rooster out in "open" pens this year. By open I mean 2 separate very large fenced pens that do not have trees or bushes or anything to hide under. There are hawks and a bald eagle pair that live around our farm. So I am worried that when they see the predators coming, they won't have anything to duck under for safety and the chicken house will be too far away. So does anyone have by ideas of easy things to use in an open area to give the chickens a place to run and hide? Also, how effective are roosters at watching and warning and protecting his ladies from overhead predators?