I've had chickens for a long time. Other than possums, ive never encountered any other predators where I live until today. My chickens free range, and at night they're safe in their pens. Today, a hawk swept down and almost snatched my little d'uccle rooster! And I wasn't standing that far, so hawks are obviously bold. Does anyone have any advice of how to deter hawks? I dont want to keep my flock penned up all day.