Historically bred for bull-baiting and later dog fighting, some individuals can be prone to aggression if not properly trained and socialized.
Rottweilers are known for their protective instincts, and if not properly trained and socialized, they can exhibit aggressive behavior.
Dobermans are known for their loyalty and protectiveness. They can be reserved with strangers and if not properly socialized, they may show aggression.
Often used as police and guard dogs, German Shepherds are known for their intelligence and protective instincts. Without proper training and socialization, they can be prone to aggression.
While not traditionally aggressive, Siberian Huskies can have a strong prey drive and may display aggressive tendencies towards smaller animals.
Like Huskies, Alaskan Malamutes have a strong prey drive and may exhibit aggression towards smaller animals.
Bullmastiffs were originally bred to guard estates, and they can be protective of their territory. They require early socialization and training.
Originally bred for guarding livestock, the Presa Canario can be reserved and potentially aggressive towards strangers if not properly trained and socialized.