Planning our run. We have 12"x16" pavers, and we were going to lay those in around the external edge of the run, so they are even with ground level (I think they're 2" thick). We are not planning to line the floor of the run. I think the bottom rail of the run walls will sit at ground level right next to the stones. Will the stones be enough to deter skunks, opossums, and the infrequent raccoon? Should the run walls be sunk 1-2" below ground? Or should the walls sit on top of the pavers? Looking forward to your experienced input.