Mastiffs are massive, powerful dogs with thick necks and sturdy bodies bred for protection roles.
American Pit Bull Terriers have lean, muscular frames perfect for athletics, weight pulling and agility.
American Pit Bull Terrier
Rottweilers have robust chests and thick figures built for strength to work as guard dogs.
As an Italian guard dog, the Cane Corso is a heavily muscled breed prized for power.
Bred as working farm dogs, American Bulldogs have stocky, muscular bodies perfect for tackling jobs.
Originally bred to hunt lions, Rhodesian Ridgebacks have defined muscular physiques.
Boxers are lean and ripped with defined front leg and shoulder muscles from hunting and agility ancestry.