Quote: I layed chicken wire around and up the side about 4-5 inches of my run to keep bigger animals from digging. It's now covered in grasses and weeds so you can't see it but if something starts to dig it will run into it. I also have electric wires running around my coop. Most predators lead with their nose and will come into contact with the wire closest to the ground(5-6" up) and will be zapped!
It is more expensive to do this and if you have little kids you may want to skip it to avoid shocking them. They may not appreciate the fact that you are just trying to keep your flock safe. I live out in an urban area and coyotes and bobcats come through here, so I have taken more precautions.