Description:  The Rottweiler is a medium-large, robust, powerful dog.  His build denotes great strength, agility and endurance.  The Rottweiler is a working dog, he is the happiest when there is a job to do whether it is herding, competing in obedience, tracking, search and rescue or retrieving the newspaper.  He is an effective guard dog, but needs firm handling and proper training.  A Rottweiler will defend his family and property to the end, but he does have a tendency to become loyal to one person.  An inexperienced owner should not consider this breed.