Rottweiler

The Rottweiler is another breed that has a bad name when it comes to aggression, but in reality Rottweiler is a friendly and loving pet. Bred to be guardians, this dog is very territorial and takes his guard duty very seriously. His bark is fierce and he has an aloof attitude, but a socialized Rottweiler can tell the difference between friend or foe.
This Post Belongs To Most Aggressive Dog Breeds