However, these dogs are aloof, and because of their watchdog nature, they will be wary of people they dont know. A bolt of energy. The Black German Shepherd is an active dog, great for those who love the outdoors.A canine born to herd, their breed comes with speed, stealth, and agility.. These dogs have a maximum running speed of 30 mph or 48 km/h and a jumping height of 5 feet or 1.5 meters. Make sure to build walls or fences more than 6 feet or 2 meters high in your backyard to prevent ...