Google is useful for finding recipes. Type in "recipes for squirrels" or "squirrel recipes" and you'll get dozens of good results. Keeping everything secure is a good idea but it takes the fun out of shooting and eating them little furry vemin.
If an animal has gotten into a bad habit dispatching would be the best choice if you don't plan to secure the coop. Otherwise sitting in a chair with a silent air rifle taking out half a dozen squirrels in 1 1/2 hours is fun too. Not to mention they taste pretty good. But I agree that it would...