We lost our beloved Charity last September to a hawk. She had eleven three-week-old chicks, too. The hawk came out of nowhere and took one of the chicks. Charity attacked the hawk and lost her life. We were only about 100 feet away when the murder occurred but there wasn't anything we could do. Charity was gone by time we got to her. Since then we have hung silver-coated CDs all around our property. We have seen the hawk flying overhead (and a couple Bald Eagles) but they keep going. Our neighbors have told us they used to have issues with raccoons but since the CDs have been posted, they only see at the edge of the property. I don't know if this because of the CDs of not. All I know is during a sunny day, the CDs reflect light and they make noise against the fencing.
We also have bells in the trees where the chickens can't get to them and bike streamers on the fence. We are trying everything we can think of to keep predators away from our family.