It's illegal to shoot or harrass any bird of prey. Federally illegal. But 1. They have to catch you doing it. Hense SSS. 2.IF they are eating your livestock (and chickens are considered livestock) you can get a permit to shoot them. 3. It is NOT illegal to harrass them in non-lethal ways if they are causing harm to you, your pets or livestock.
I can tell you (but not how I know) that shot gun blasts keep them away for a while. Also banging on a metal bucket and chasing them across the yard moves them on to the back feild to hunt instead of your back yard. (and didn't I look like a lunatic doing THAT a couple of times this fall when they were migrating and congragating on the cell tower to scope the place out)





