OK I have the answer for this one. And it is not a normal approach. I saw this on TV so it must be true.
In the Bass Pro or Cabellas catalog maybe they sell a Coyote lure. It is a little machine that twirls around and makes noises of an animal in distress. i saw a guy use this device to scare away geese from his yard. It was on a timer and went off every 15-30 minutes. Scared the BJesus out of the Birds.....
http://www.youtube.com/watch?v=Zs1_DmD6Azs
you could probably make something yourself like it Maybe use a stuffed animal like a dog instead....
