I have heard some folks say that you have to bury hardware cloth horizontally underneath your entire run if you want it to be secure from digging predators. But this video linked below from Iowa State University says all you have to do is bury fencing vertically around the perimeter, 12" down and 6" "toed out." I'm inclined to try the easier route first. What do y'all think? Tell me your experiences with digging predators.