6. Dogo Argentino

Originating from Argentina, the Dogo Argentino is a muscular and powerful breed bred for hunting big game, including wild boar and even pumas. Despite their intimidating appearance, these dogs are not inherently aggressive towards humans.

Nevertheless, due to their original purpose, the Dogo Argentino is illegal to possess in the United Kingdom under the Dangerous Dog Acts of 1991.

7. Doberman Pinscher

The Doberman Pinscher is a medium to large-sized breed created by Karl Friedrich Louis Dobermann as a guard dog. Known for their distinctive features, such as a long muzzle and pointed ears, Doberman Pinschers are vigilant and highly intelligent.

Their strength and intelligence can pose a potential danger if they sense a threat to their owners or home. This breed often displays aggressive tendencies towards strangers and other dogs.

8. German Shepherd

The German Shepherd is a globally renowned breed known for its high intelligence and versatility. With their loyal and courageous nature, German Shepherds excel in various roles, including police, military, search and rescue, and as companions.

They require regular physical and mental stimulation, and without appropriate training and socialization, they can be hostile towards approaching strangers.

9. Perro De Presa Canario

Originating from Spain, the Perro De Presa Canario, or Canary Dog of Prey, is a large dog breed believed to be a mastiff and hunting dog mix. With a muscular and compact appearance, this breed was originally bred to guard livestock.

Early socialization and training are essential to ensure they become suitable family pets. Known for their aggressive nature, these dogs have a bite force of 540 PSI, making them a force to be reckoned with.

10. Fila Brasileiro

The Fila Brasileiro, or Brazilian Mastiff, hails from Brazil and is recognized as one of the largest dog breeds worldwide. Developed to work on plantations, the Fila Brasileiro was trained to track livestock and chase predators like jaguars.

Their excellent tracking abilities contribute to their aggressiveness, as they instinctively clamp their jaws onto opponents' necks. Even during playful interactions, this breed's strength can inadvertently cause harm.

11. Basenji

Originating from Central Africa, specifically the Congo, the Basenji was bred for hunting and possesses a distinctive yodel-like bark due to its unique larynx shape.

Intelligent, alert, and curious, the Basenji can be challenging to train due to their stubbornness and strong personality. Combined with their powerful jaw, they can pose a threat when provoked.

12. Gull Dong

The Gull Dong is a crossbreed between the Bully Kutta and the Gull Terrier, commonly referred to as the Pakistani Bulldog.

Originally bred for fighting, this robust and loyal breed can exhibit fierce protectiveness towards its master. However, it can be moody and challenging to train, requiring dedicated attention and affection.

13. Rottweiler

Originating from Germany, the Rottweiler, also known as the Rottweiler Metzgerhund, served as a cart-pulling and livestock-guarding dog in the Rottweil region.

With a strong protective instinct towards its owners, this medium to large-sized breed requires proper training and consistent socialization to ensure good behavior. Otherwise, Rottweilers can pose a significant danger to unfamiliar individuals.

14. Boerboel

The Boerboel, a massive mastiff breed hailing from South Africa, features a distinct black mask and a broad, sturdy bone structure. With their territorial and dominant nature, these strong and sizeable dogs are excellent guard dogs.

There are even reports of Boerboels displaying aggression towards intruders, as exemplified by a tragic incident in North Carolina. However, their protective instincts need to be properly managed to prevent harm to both family members and strangers.

15. Cane Corso

Originally bred in Italy and descended from the Canis Pugnax, the Cane Corso is a muscular and imposing mastiff breed. With their loyalty and protective nature, these dogs can make excellent family pets when offered the appropriate training and socialization.

However, due to their history as war dogs and their continued use in more protective roles today, like guarding and hunting, they can exhibit a dangerous side if not properly managed.

16. American Bandogge

The American Bandogge is a powerful and muscular breed resulting from the crossbreeding of a Neapolitan Mastiff and a Pitbull Terrier. As a result, these dogs possess explosive energy and strength.

Historically bred for fighting and guarding, they may pose a threat not only to intruders but also to innocent bystanders. Additionally, their extremely loud bark can be disconcerting.

17. Alaskan Malamute

The Alaskan Malamute, bred as a sled dog and hunting companion, is known for its strength and endurance. With a resemblance to the Siberian Husky, this large and fluffy breed requires constant physical activity and mental stimulation to prevent boredom-induced problem behaviors.

While not inherently aggressive, their size and energy levels make it crucial to supervise their interactions with elderly individuals and young children.

18. Boxer

The Boxer, hailing from Germany, is a medium to large-sized breed known for its soft, waterproof coat and muscular square head. Initially intimidating, Boxers are, in fact, playful and filled with energy.

However, their stubborn nature can make training a challenge, and there have been reports of attacks from this breed. Caution must be exercised when dealing with a Boxer.

19. Bullmastiff

Crossbred from the English Mastiff and the Old English Bulldog, the Bullmastiff is a large domestic breed characterized by a short muzzle, solid musculature, and black face and ears.

Originally bred in the 19th century as estate guards, Bullmastiffs are generally not aggressive toward humans. However, their dominant nature can lead to hostility towards dogs of the same sex if not properly trained.

20. Bull Terrier

The Bull Terrier, distinguished by its unique egg-shaped head and small almond-shaped eyes, may appear small initially but possesses considerable lean muscle.

Originally bred as fighting dogs, Bull Terriers can be affectionate when given the appropriate love and care. However, they have strong prey-driven instincts and tend to confidently attack smaller animals.

21. Akita Inu

Originating from the mountainous regions of northern Japan, the Akita Inu is a larger breed with dominant tendencies. Effective training requires displaying leadership and authority as an owner.

While affectionate with their masters, Akita Inus have strong protective instincts and may not get along well with strangers, making them well-suited as guard dogs.

22. Chow Chow

The Chow Chow, a large and fluffy breed native to China, may appear adorable with its plush bear-like appearance. However, this breed possesses substantial power and independence.

Known for their strong-willed nature, Chow Chows require rigorous training and can exhibit aggression, particularly towards strangers. Due to their size and unpredictable behavior, they may not be suitable for households with young children.

23. American Bulldog

The American Bulldog is a large and muscular breed renowned for its athleticism and versatility. Bred for strength and agility, they excel in roles on farms and in canine sports competitions. Their energy and activity levels make them formidable assets.

However, when provoked, American Bulldogs can display intense aggression. With their powerful muscles and impressive speed, it is advisable to avoid any confrontations with an American Bulldog.