hmmm "tenacious, possessive, stubborn" and this "They are protective and brave. The Rottweiler is a naturally protective breed, which needs no training in order to learn about defending their property and family. They are watchful and territorial, and will consider all of their human pack as under their protection. This makes them excellent working dogs for security and police work, as the dog will not back down in the face of frightening situations or threats, but it does mean that within the domestic home, the dog must be taught not to attempt to scare off visitors!"