The German Shepherd is known for its courage. Originally, its job was to defend sheep against wolves and those genes are largely alive and well. They make excellent guard dogs; additionally, they are a favorite with the Police. It may come as a surprise, but German Shepherds also excel at jobs at the other extreme — for example, as guide dogs for the visually impaired. The German Shepherd is a highly intelligent breed. Happily, they are very willing to apply this intelligence when being trained. And as a result, you should expect that they will require regular mental stimulation. The German Shepherd is a dignified dog that is loyal, aloof, and somewhat antisocial.