I've had to sit out in a chair with a .22 and catch them coming down the trees before, but it will continue to be a problem especially with loose grains on the ground (as it will continue to attract squirrels and other critters like mice/rats/wild birds). If you're needing to dispatch squirrels, don't let them go to waste! They're good practice for small scale learning to tan, and the tails are great for making fly-fishing lures. Also, cook up some fried squirrel!