And persistent. It took me about a week with the electric fence to get it exactly right, even after the coons got shocked more than once. Once I got it perfected, and they could not find any way in without getting zapped, they finally stopped getting in, BUT even now, they still check it out to see if there is a vulnerability.
XD
That might be kind of fun to see one of them get zapped. Like watching Justified almost, where the critters are almost begging for it.