This is too funny (I think) - my girls have been digging in one spot. It s at the farthest corner of their run. I think there is a pine tree stump there or else something yummy buried. They will go for a few days and not do anything and then it only takes one to start working it and then they take turns. They keep digging up tree bark. My question is do I let them keep digging or do I do something about it. If so what would I do. Figured if I filled it in with dirt they would just dig it up again. Any suggestions?