Schutzhund is a German word meaning "protection dog". It refers to a sport that focuses on developing and evaluating those traits in dogs that make them more useful and happier companions to their owners. Schutzhund is intended to demonstrate the dog's intelligence and utility. As a working trial, Schutzhund measures the dog's mental stability, endurance, structural efficiencies, ability to scent, willingness to work, courage, and trainability.