I have lost 3 chickens to a coopers hawk over the past month and a half. The first was a Lakenvelder rooster, and then two rhode island white hens. I have redtails all over the place and they never bother the chickens at all. Bald eagles fly right over without a care. I had to chase the hawk away back in October. I let all my chickens free range during the day. The coopers hawk chased two hens and two roosters into the edge of the woods and then was hunting them from the ground. Didnt get any that day, but got the three since then. I am amazed how many times Ive read on the internet that coopers hawk wont or cant killl a full grown chicken. They can, and they can fly off with it too.