I need to seal my run to the ground so nothing can dig under it. The problem is the soil it's on is full of roots. I'm wondering if anybody has any tips on how to protect your run that doesn't involve so much digging? I've heard of people burying roof flashing just below the edges of the run so if something dogs down it will cut it's paws. Anyone have any experience with that? Also, has anyone ever had a raccoon dig under the run? I'm not worried about dogs or coyotes, so if raccoons wont actually dig under than i wont need to secure it as well as I was thinking. Thanks!