Have small flock, 11 hens, no roosters allowed in my neighborhood. 4 unsuccessful hawk attacks that I have seen. Since attacks started, I have been keeping hens in a closed run, but they have been free ranging until now. Red-tails are protected by the Migratory Bird Act. Not going to kill the hawk, but dont want to lose any of my hens. Chasing hawk off when I see it, usually back the next day. Any non-lethal suggestions.