I have a soon to be 11 year old Black Lab. She is a GREAT dog, but has one irritating habit. She digs in the carpet. Not in one particular place but all over the house. There is no normal lead up to it. She will do it after you play with her, walk her, or she could be just laying around sleeping. She just starts digging and when you tell her to stop she looks at you like you are crazy and doesn't understand why you want her to stop. When she is outside, sometimes she will dig in the flower beds.