If you have a critter proof fence and are having problems with dogs or fox trying to dig under, why would you dig in the skirt? It doesn't make sense to loosen the dirt for them by digging the wire....... seems you're just loosening the packed ground for them. Why would you go to all that sweat and work when a couple foot of wire flat, maybe with a few stakes to hold it down, would be so much easier and more effective? It just doesn't make sense. Can someone explain this line of thinking?