Diggers do their damage out of sight. By the time you notice it, a tunnel may be under your patio.

Signs

Sunken pavers, soft ground near the foundation and fresh dirt mounds are early signs.

What causes it

Armadillos hunt grubs. Groundhogs look for shelter and food. Both love loose soil, mulch and covered spaces.

How to stop it

Remove the animal, fill the burrow and add a buried barrier around decks and sheds. Reduce grubs and keep grass trimmed.