You have to be innovative, as in attempts to control ALL predator harassment. We move the CD's around frequently. We also use bird bombs whenever the flock alarms. I have an advantage in that I work from home, and my husband is retired, our adult children are sometimes here, so we can make trips out throughout the day to check on our birds. A dog helps. Roosters and bigger birds (we have peafowl) definitely help. Roosters will (unfortunately) sacrifice themselves for the hens, so that is one reason why we have more than one rooster, and yes they do coexist more or less peacefully. I can't say that we have not lost any chickens to predators, but hawks are low on the list lately and our loss to predators overall is amazingly low, considering that we live on a (yes, beautiful) piece of wooded twenty acres, with corn and bean fields, woods, and wetlands surrounding us.