10 The German Shepherd
This breed has a personality marked by direct, fearless willingness to protect human children. The dog must be approachable, quietly standing its ground and showing confidence and willingness to meet overtures without itself making them. It is poised, but when the occasion demands, eager and alert; both fit and willing to serve in its capacity as a companion and watchdog.
9 Doberman Pinscher
Doberman Pinschers are, in general, a gentle, loyal, loving, and highly intelligent breed. Although there is variation in temperament, a typical pet Doberman attacks only if it believes that it, its property, or its family are in danger. According to the US Centers for Disease Control, the Doberman Pinscher is less frequently involved in attacks on humans resulting in fatalities than several other dog breeds such as pit bulls, because they can be trained to restrain an unwelcome intruder but not kill him. The breed was used extensively by the U.S. Marines in World War II, and 25 Marine War Dogs died in the Battle of Guam in 1944: there is a memorial in Guam in honor of these Doberman Pinschers
8 Rottweiler
In the hands of a responsible owner, a well-trained and socialized Rottweiler can be a reliable, alert dog and a loving companion. However, any poorly trained dog can become a danger in the wrong circumstances. The Rottweiler is a steady dog with a self-assured nature, but early socialization and exposure to as many new people, animals, and situations as possible are very important in developing these qualities. The Rottweiler also has a natural tendency to assert dominance if not properly trained. Rottweilers’ large size and strength make this an important point to consider: an untrained, poorly trained, or abused Rottweiler can learn to be extremely aggressive and destructive.
7Pyrenean Mountain Dog
The Great Pyrenees (Pyrenean Mountain Dog) is a capable and imposing guardian, devoted to his family, and very wary of strangers. Males weigh in at about 100-160 pounds (45-73 kilograms), and when not provoked it is calm and somewhat serious. Courageous, very loyal, and obedient, devoted to family even if self-sacrifice is required. During World War II the dogs were used to haul artillery over the Pyreneean Mountain range to and from Spain and France.
6 Greater Swiss Mountain Dog
The Greater Swiss Mountain Dog is a large, muscular, tricolour (black, rust, and white; typically with a white blaze) dog. Males should weigh around 60 – 70 kg the height is 65 – 72 cm at the shoulders. Swissies have a very strong pack instinct. They are protective of their family and training is important for them to learn their place. They want the pack to be together and gets distressed when a member wanders off.
5 The Moscow Watchdog
After World War II, breeders in Moscow wanted to create a watchdog that would be particularly receptive to spoken orders. They took the Caucasian Ovtcharka (caucasian shepherd) – possessing wariness and ferocity, and the Saint Bernard – a larger breed with a gentle temperament, and now, over fifty years later, the Moscow Watchdog possesses the mental and physical attributes desired by the original breeders.
4 Boerboel
The Boerboel, the only breed of dog solely and specifically bred to defend the homestead. The dog should give the overall impression of immense substance, strength, power, and physical ability, and should be able to more than amply demonstrate this in his day to day work. Boerboels are a very dominant but intelligent breed, with a strong watchdog instinct. They are self-assured and fearless, but responsive to the needs of the family displaying an intuitive ability to sense if the family is in danger. Like other large dogs with a strong guard instinct, the Boerboel needs to be watched around strangers always, and introduced to friends and other dogs early on to avoid aggression, and like all dogs should never be left with young children unattended.
3 Argentinian Mastiff
The Dogo Argentino or argentinian mastiff, is a large, muscular and athletic white-coated dog with an unusual history. They are excessively tolerant of children due to their high pain tolerance, derived from selective breeding to be big game hunters. They are protective of what they perceive as their territory and will guard it without fear against any intruder. The minimum height for the male is 62 cm (24.3 inches).
2 Cane Corso
The Cane Corso is a medium-large guard dog native to Southern Italy. Its stable temperament and powerful body make him particularly valued as a guard dog and protection dog. Traditionally, rural Southern Italy has always used this rustic type of dog for the hunting of big game and for guard and protection work. These dogs were known under various regional names: Vucciuriscu (or Bucciuriscu) in Sicily, Cane della masseria in Puglia, Cane da Macellaio (Butchers Dog). The official FCI standard calls for dogs to stand from 60-68 centimeters at the withers (23.6-26.7 inches).
1 Caucasian Shepherd
I’m a dog owner and breeder, and I tell you, if you have a place (house, yard, facility) to protect, This is the dog you need. Excessive softness or vicious temperaments are considered serious faults for the breed some say, but if you really want the bigest, meanest dog around, he’s the one. This breed is very rustic and adapts quickly to every climate. The Caucasian Shepherd is well adjusted and active. However, he is highly suspicious of strangers, and he may become aggressive.
+The Wolfdog
The Wolfdog. Half wolf, half some large shepherd breed. Vicious, hard to train, eats a lot, not very a very loving pet, but who would dare break into your home when you got wolves in the back yard? The dog pictured above is a Wolf-German Shepherd cross. This article is licensed under the GFDL because it contains quotations from Wikipedia.