Digging

Avoid Loneliness
A dog that is pushed outdoors after it misbehaves in the house may continue its misbehaving by digging in the yard. Controlling your dog's behavior inside addresses that problem as well as unacceptable digging outside.
During summer months, he may dig a hole to cool itself, consider providing a cooler location for him. Be certain it has access to some shade throughout the day and that fresh drinking water is always available.
Some dogs tend to roam and will dig under a fence to get out of the yard. Ideally, a fence should fit tight to the ground or even be buried a few inches underneath to prevent a dog's crawling or digging out from under it. A neutered dog is generally calmer and tends not to wander.