Digging
Dogs dig for a number of reasons: to cool off, chase rodents, bury and retrieve
bones, escape confinement, or just for the fun of it.
Digging commonly occurs when pets are left alone with insufficient stimulation. Provide your dog with stimulating chew toys, increased play and exercise, and perhaps even a second pet. Of course, give some thought to the addition of a second pet, since you could end up with two diggers instead of one.
Try these methods to discourage digging:
Wayne L. Hunthausen, DVM, and Gary M. Landsberg, DVM