The German Shepherd Dog (GSD) was developed from working herding dogs around 1900 as an all-around working dog. Within a few years it was clear that the dogs were losing their working ability. Schutzhund was developed at this time as a test of working ability for GSDs. Only GSDs that had passed a Schutzhund test or a herding test were allowed to breed and thus have their progeny registered as German Shepherd Dogs. This is true in Germany to this day. It is only by testing the working ability of every generation that the strong working characteristics of the GSD have been maintained. Dogs of any breed, even mixes, can compete in Schutzhund today, but the most common breeds are GSDs, Belgian Malinois, Rottweilers, Doberman Pinschers, Giant Schnauzers, Bouvier des Flandres, Dutch Shepherd Dogs, American Bulldogs, and the like.
There are three schutzhund titles: Schutzhund 1 (SchH1), Schutzhund 2 (SchH2), and Schutzhund 3 (SchH3). SchH1 is the first title and SchH3 is the most advanced. Additionally, before a dog can compete for a SchH1, he must pass a temperament test called a B or BH (Begleithundprüfung, which translates as "traffic-sure companion dog test"). The B tests basic obedience and sureness around strange people, strange dogs, traffic, and loud noises. A dog that exhibits excessive fear, distractibility, or aggression cannot pass the B and so cannot go on to schutzhund.
The Schutzhund test has changed over the years. Modern Schutzhund consists of three phases: tracking, obedience, and protection. A dog must pass all three phases in one trial to be awarded a schutzhund title. Each phase is judged on a 100-point scale. The minimum passing score is 70. At any time the judge may dismiss a dog for showing poor temperament, including fear or aggression.
The tracking phase
In the tracking phase, a track layer walks across a field, dropping several small articles along the way. After a period of time, the dog is directed to follow the track. When the dog finds each article he indicates it, usually by lying down with the article between his front paws. The dog is scored on how intently and carefully he follows the track and indicates the articles. The length, complexity, and age of the track varies for each title.
The obedience phase
The obedience phase is done in a large field, with the dogs working in pairs. One dog is placed in a down position on the side of the field and his handler leaves him while the other dog works in the field. Then the dogs switch places. In the field, there are several heeling exercises, including heeling through a group of people. There are two or three gunshots during the heeling to test the dog's reaction to loud noises. There are one or two recalls, two or three retrieves, and a send out where the dog is directed to run away from the handler straight and fast and then lie down on command. Obedience is judged on the dog's accuracy and attitude. The dog must show enthusiasm. A dog that is uninterested or cowering scores poorly.
The protection phase