This is an instructable about how to get rid of those unwanted critters in your yard.
All you need is an powerful air gun and some peanuts. Lay the peanuts some where in your yard and wait for chipmunks, squirrels, etc to come and feast. When they are still shot them with the air gun. When you shoot them they will twitch but don't think they are in pain. Their nerves are just reacting even though their brain is out.