The Rottweiler is somehow just like the previous one, Australian cattle dog; they may be common in one thing which is cattle. There first job was to bring cattle to market. And before German shepherd dominates the police job it was a mission of the Rottweiler.
This dog served as a police dog besides doing great job in war as a military dog. So, to serve in such great positions you need to have something special in you. That is true this dog is known by having keen perception besides his loyalty to the owner.