I have heard of that but I have 4 acres that they roam. I guess it would help with the smaller ones who stay closer to the coop. I am so angry...I'm so sorry. Why is it always the special ones? She was gorgeous. We have a small enough yard, with big enough lilacs in it, that it would be very hard for a raptor to swoop in and take one of our hens. Not impossible, but luckily it hasn't happened. I saw in a magazine recently where someone took some kind of twine or something and just ran it across the top of the chicken yard, stapling it to the top of the fence rails. They ran stripes close enough together to keep out a predator-sized bird. That might be more workable, and certainly cheaper, than netting.