I agree pictures would be nice. One picture is usually worth a thousand words. There are many predators that will dig. I have had coyotes that have dug that far. Nothing has penetrated since I put the electric wires around my coops and pens. I think the predators actually teach their young that a chicken isn't worth getting zapped for. As I said previously cameras are nice too, then you will know what is lurking around and can form a plan. Good luck...