Being bred to work hard all day means that most Aussies are not content to be couch potatoes, although Aussies have individual characters and some are more sedate and quiet-natured than others. For the most part, however, these are high energy dogs who need a purpose in their lives-a job as it were. Owners must be committed to give these dogs the time and attention they require through play and training, for as with any dog, undirected energy can turn towards destructive behaviors such as digging and chewing. Running, jumping, and rough-housing are all a part of being a normal Aussie.
The Austrailan Shepherd Club of America
We all need a sense of purpose in our lives. Dogs do too.
garyskitchen.net 
So precious!