German Shepherd German Shepherd, people will also be called the German black shell, German Shepherd’s movement is agile, and suitable for a variety of difficult operating environment, and in World War II, originally the German Shepherd was recruited by the German army as a military dog along, this breed is tall and powerful, with very strong working ability, so often to search and rescue dogs, military dogs, police dogs, guide dogs, sheepdogs The Labrador Labrador is a large and powerful dog with great working ability. Labrador Labrador is a large dog breed, is also a suitable for the role of guide dogs and police dogs, strong working ability, but not much aggression to humans, so and Golden Retriever, Siberian Sled Dog and known as the three non-aggressive dog breeds, and high IQ, ranked six in the world.
The Golden Retriever Golden Retriever is also one of the more common domestic dogs and has a strong working ability. The dog is more patient and easy to feed, but needs regular exercise. Bloodhound This breed was formerly bred in Belgium as a hunting dog and has an indomitable spirit and a superb sense of smell, so it is also more capable of working.
