Famous K-9 dogs. They are known to be fearless and confident dogs. German Shepherds are in need of constant and serious physical activity though, and they seem to give preference to long walks and active games. German Shepherds are working dogs developed originally for herding sheep. Since that time, however, because of their strength, intelligence, trainability and obedience, German Shepherds around the world are often the preferred breed for many types of work, including search-and-rescue, police and military roles and even acting. German Shepherds are the second-most popular dog in the United States and fourth-most popular in the United Kingdom. They can become over-protective of their family and territory, especially if not socialized correctly. They are not inclined to become immediate friends with strangers. German Shepherds are highly intelligent and obedient. Origin: Germany ; Weight: 70-85 lbs; Height: 22-26 inches.