Flockwatcher, the only predator that seems to get along with the radio is a O'possum, and they get along with about anything.
I have a large coop 24 x 20 divided into 4 10 x 10 's with a hallway down the middle, and it is covered with 2 x 4 dogwire and
1 inch chicken wire AND electric fence...
Smilebrite.................I find running a RADIO at night on a good country station helps keep most of the wary critters away from your
coop....I do use the blinking red lights, electric fences, and a good shotgun from time to time...............k4eqh