Pit Bulls account for the most fatal attacks on humans. However, the danger depends on how they are trained and handled.
Rottweilers' large size and strength make their bites highly dangerous. They need extensive obedience training and socialization.
German Shepherds can be aggressive when poorly trained or handled. Their bites can cause severe injury due to large jaws and strength.
Bullmastiffs are powerful guard dogs capable of knocking down and seriously injuring adults if aggressive. Proper training is essential.
The Presa Canario is a mastiff bred to guard livestock. Their bites can be brutal without control.
Cane Corsos are physically powerful dogs that require experienced owners to manage their guarding instincts.
Dobermans have strong bite force and size capable of causing grave injury. Their aggression has declined with breeding.