I swear our youngest dog, Nike, is part bulldozer/part beaver. If she isn't gnawing on the house (I have to give her old bits of aquarium wood to chew on), she is out excavating our backyard.
She has one designated spot that she goes and stands in whenever someone comes down because she likes someone to dig with her. If Eos our other girl (she likes snapping at the dirt) doesn't come over Nike chases her down and barks at her to come back.
She squeals like a stuffed pig while she is digging, and heaven help it if you back fill her hole. She dug a hole in our old sandpit so deep you could fit nearly up to your knee. I'm surprised no one broke their neck in it haha