I have two everyday that circle the pens. I moved my wife's close line over the pens and keep clothes on them all the time. It has helped, the hawks did make a attempt at one of the small pens under the trees two days ago. I looked out the window to see him in the pen, but he did not get any birds. I guess he could not dive and had to negotiate the limbs gave the bantams enough time to seek cover. They still make a attempt everyday but the lines trees and clothes slow them down to much to make a dive. One of them hit a line the other day and it seemed to daze him and he stood on the ground until one of my ducks attacked him. I have never seen so many hawks as this year, maybe it is the cold driving them south, but I sure wish they would pick on somebody else.
I have also moved as many obstacles into the pens as I can find in the yard. Picnick tables, statues whatever my wife has out there I moved to create obstacles. I may order some rebar cut and drive in the ground it will not affect the chickens but the bigger hawk will have to negotiate them.