Sadie does it too! The funniest is that she has a certain spot on the hardwood floor that she will dig. I always wonder if there is something under that board
She will also dig on the couch if her bone or toy gets underneath it. Mainly she throws the toy and it slides under there. Once she realized we would come running when she would dig on the couch to make her stop she now does it for attention. But its really funny b/c her ears rotate out and she has this really intense look on her face so i try not to laugh as i make her stop.
She just learned to dig outside...of course she is going after bugs to eat them
the holes are about 1 inch deep and 2 inch wide so i just go back and push the dirt back in w/ my foot and the next day she does it again.