Thanks, if you look closely you will see that I have a two wire electric fence that goes all the way around the pen. It is on a timer so that it turns on just after dark and turns off at sunrise. Last year when I first put it up, the first week or so we heard cats, raccoons, and possums screaming in the middle of the night. After that first week we haven't heard a sound.
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Jeff Benfer
gartersnakemorph.com