Wikipedia
Schutzhund
Schutzhund ( German for "protection dog") is a dog sport that was developed in Germany in the early 1900s as a breed suitability test for the German Shepherd breed. The test would determine if the dog displayed the appropriate traits and characteristics of a proper working German Shepherd. Today, it is used as a sport where many breeds other than German Shepherd Dogs can compete, but it is such a demanding test that few dogs can pass.