He hasn't been a digger yet, but he's only 8 months old and hasn't had free run of a fenced in yard either. There is no expectation that he will be left out alone for any extended period of time. i.e. No plans to leave him out when my daughter goes to work, shopping etc.
At least that's the plan. She was part of the planning and helped out on the install, so any issues are on her.