I just saw one swoop low through the yard, the girls will stay locked up for awhile today.
You could always lobby them to put in a wind farm next to you. There used to be eagles here in the winter but not since the (expletive deleted) wind farm was put in. I still have an occasional hawk come through and even an annual visit from an Osprey. The only poultry that I have lost to birds of prey are to Great Horned Owls and only during the night. They often roost in my trees during the daytime but have not bothered the poultry during the day.