I own a business which sells animal deterrents. Out here in the west we have had a lot of snow this year and we have had a lot of calls about foxs and coyotes getting in to coops and killing chickens a lot. We have sold a product called critter gitter which lets out a gosh awful noise and flashes lights when an animal is detected in the motion activation plus heat sensor. The noise resets and next time an animal comes in to range a different sound occurs so the animal does not get used to the sound. It also has two small nights that look like eyes to scare the animal even more. This has been very effective. We also have special ordered a urine mix containing wolf and cougar urine together. Fox and coyotes will not come near the stuff and stay away as long as it is used correctly. Leave me an email at [email protected] if interested and we will let you know a price for either product.