When i called the department of fish and game about killing or relocating the Great horned owl that got into my coop. the conservation officer told me to open my coop and release the owl (it had got in during the night and couldn't get out.). I told her it would come back and get more of my birds and she said "then you better build a better coop." she said birds of prey are protected and killing them for any reason is illegal via federal law.
so unless we can convince Obama to institute another one of his stupid executive actions to allow us to shoot birds of prey that kill chickens. The hawks and owls can eat all of our chickens with no penalty.
However, I did find a falconer that was willing to trap a red-tailed hawk that was killing my hens. he said that his falconers license allowed him to trap wild birds of prey to be trained as hunters. the hawk ended up never coming back after the 3rd hen is consumed. so he never got her trapped.
I don't know if will have any luck with this route but it is worth a shot.