I live in the sticks and contend with the entire gambit of predators, Foxes, bobcats, coyote's, Feral dogs and cats, racoons opposums and the like. I am a lifelong hunter and trapper. I kill them all on site as a general rule and trap as many as I can. BUT and this is a big but, around my home and coop, I do not have the options of trapping due to my own dogs, neighbors dogs and cats and the like. After loosing many chickens to the world of the woods, I saw an ad in the Farm Show magazine for a product called Niteguard. It is a simple LED flashing red light, solar powered, that runs dusk to dawn. Being a hunter I already knew that red is a warning color to animals and they do not like to think someone is looking at them as they stalk, The flashing light simulates an eye looking at the predator as it stalks. The units are a little pricey,, $29.95 each. But I ponyed up the money for 8 units and installed them. I am on month number 10 and have not lost a single chicken since then. I have personally seen both a coyote and a fox leave the area when they saw the light. I guess it's un-nerving to them. (The fox got away, the coyote didn't.) They are not noticable at all at night. I am no way affiliated with the manufacturer so this is a true testimonial for their product. The link to the website is http://www.niteguard.com/.