I know the traditional wisdom for ways to prevent predators from digging under the run fence is to either bury some wire fencing or skirt wire fencing out along the ground on the outside of the run. But what do you all think about using wood instead of fencing for the skirting? A layer of board laid flat on the ground covering about 15 inches from the run on out. I have tons of available wood boards, and would have to buy wire fencing new. I'd appreciate your thoughts! Thanks!