This article is from the United Schutzhund Clubs of America website.
Schutzhund was developed in Germany in the early 1900s as a breed suitability test for the German Shepherd Dog. It was designed to test the natural instincts of the breed and to weed out the dogs that were either unstable or untrainable. This helped ensure that breeding stock would pass on the most desirable traits to working dogs such as police dogs, military dogs, and search and rescue dogs. READ FULL ARTICLE