Geesh..how timely! I was going to post the same question! Cody wasn't a digger, but Klo has sure made up for it! (her trainer said she was part Beagle and I think she's right) We have moles, chipmunks, groundhogs, all sorts of critters and I think she smells their burrows. Thanks for the tips! I'll try putting mesh in the 2 holes to China!