I watched a Cooper's hawk (I believe) attack one of my rather large Ameraucana crosses. It was fascinating (frightening) to watch (Jackie Chan made it through without injury and is doing fine to this day). I was standing about 10 feet away- the hawk *so* didn't care, until I pitch a rock at it. Then if flew away (about 10 yards) and landed on a mesquite and waited. So I pitched another rock. We had a dog, albeit older dog, in the yard at the time. Ever since we got our girls, the visible predator count has gone up. More coyotes, bobcats and constant fly overs (some landing on our chain link) by hawks. I love predators and I love my girls, so we took measures to secure the coop/run. When the girls are in the run they are perfectly safe. When they are out and about in the yard, it's survival of the fittest. As long as they are in the run for the very early part of the morning, things have been ok. That's when we've seen/dealt with the majority of our predators. Good luck! and make it as safe as you can for your flock. Once the predators catch on, I've experienced it's only a matter of time before they attempt a kill. I (and Jackie Chan) was lucky that I was home when it happened.