
Many of the now prominent guardian breeds such as Rottweilers started as farm dog types but then developed over many years into guard breeds. Some breeds, such as the Weimaraner and Rhodesian Ridgeback, were originally bred for hunting, but their large intimidating look and territorial instincts have helped them evolve into guard dogs in today's society. Others like Dobermans were specifically bred as guard dogs. Many of the below breeds have a greater amount of molossoid or mastiff DNA. This is confirmed by a DNA study done on >270 pure breed dogs. The study suggests that in the distant past thirteen ancient breeds broke off early on after which a group of mastiff style dogs were developed. These dogs are grouped with the mastiffs Great Dane and Irish wolfhound. The Irish wolfhound (a traditional hunting guardian breed) has evidence that its population was nearly wiped out 200 years ago and its existing members descend from a very small group of dogs and thus it is a rebuilt breed, but evidently out of somewhat different building blocks. Some people think that the Irish wolfhound contributed to the Great Dane.
List of breeds commonly used as guard dogs
Guard dogs, like this German Shepherd, may be trained to target the arms and legs, incapacitating—but not killing—intruders.
American Bulldog
American Pit Bull Terrier
American Staffordshire Terrier
Anatolian Shepherd (US and UK) or Kangal Dog
Belgian Shepherd Dog (Malinois)
Black Russian Terrier (Russia)
Boerboel (South Africa)
Boxer (Germany)
Bullmastiff
Cane Corso (Italy)
Chow Chow
Doberman Pinscher
Fila Brasileiro (Brazil)
German Shepherd
Giant Schnauzer
Guard dogs, like this German Shepherd, may be trained to target the arms and legs, incapacitating—but not killing—intruders.
American Bulldog
American Pit Bull Terrier
American Staffordshire Terrier
Anatolian Shepherd (US and UK) or Kangal Dog
Belgian Shepherd Dog (Malinois)
Black Russian Terrier (Russia)
Boerboel (South Africa)
Boxer (Germany)
Bullmastiff
Cane Corso (Italy)
Chow Chow
Doberman Pinscher
Fila Brasileiro (Brazil)
German Shepherd
Giant Schnauzer
Rare breeds that are gaining popularity
Antebellum Bulldog (USA)
Black Russian Terrier (Russia)
Boerboel (South Africa)
Caucasian Ovcharka (USA)
Chippiparai (India)
Combai (India)
Formosan Mountain Dog (Taiwan)
Kanni (India)
Rajapalayam (dog) (India)
Serbian Defensive Dog (Serbia)
Antebellum Bulldog (USA)
Black Russian Terrier (Russia)
Boerboel (South Africa)
Caucasian Ovcharka (USA)
Chippiparai (India)
Combai (India)
Formosan Mountain Dog (Taiwan)
Kanni (India)
Rajapalayam (dog) (India)
Serbian Defensive Dog (Serbia)