A friend of mine lost a silkie today to a large Red tail. It went right into the run but didn't even try to fly away with it. I have been on his butt about getting something over the top of the run, even if you let them out they still can run back into the run for protection when it is covered. He already lost one on Saturday to a dog, the RIR/BCm used to jump his 4ft fence out front to lay her eggs in a duckboat again told him to get her stop that behavior and keep her from escaping.