3. Chow Chow<\/strong><\/span><\/h3>\n\n\n\nThe Chow Chow is a medium-size dog in the “non-sporting” group by the AKC. They typically weigh between 45 and 70 pounds and have long, thick coats that can come in red, black, blue, cream, or cinnamon colors.<\/p>\n\n\n\n
The exact origin of the Chow Chow is unknown, but it is believed that they originated thousands of years ago in either China or Mongolia where they were most often used as hunting and herding dogs. They became popular in the U.S. during the 20th century when President Calvin Coolidge kept one as a pet.<\/p>\n\n\n\n
Chow Chows tend to have dominant personalities and can become assertive at times. Because of their assertiveness, they are not good for first-time dog owners.<\/p>\n\n\n\n
You’ll need firm training to raise a well-mannered Chow Chow. It has also been noted that they do not have good peripheral vision, so they can be startled easily.<\/p>\n\n\n\n
However, they’re among our list of most aggressive dogs.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\nTested<\/strong><\/td>Passed<\/strong><\/td>Failed<\/strong><\/td>Percent That Passed<\/strong><\/td><\/tr>99<\/td> 71<\/td> 28<\/td> 71.7%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nStatistics from the American Temperament Test Society (ATTS)<\/em><\/p>\n\n\n\n#4. Doberman Pinscher<\/span><\/h3>\n\n\n\nThe AKC classifies the Doberman Pinscher as a medium-sized dog in the “working” category. <\/p>\n\n\n\n
They weigh between 70 and 90 pounds and have thick, glossy, short-haired coats in red, black, blue, or fawn colors.<\/p>\n\n\n\n
Karl Louis Doberman is credited with the development of this German breed. He worked as a tax collector and desired a dog to accompany him on his excursions to the more perilous places to which he visited.<\/p>\n\n\n\n
Doberman pinschers are very clever canines that have been regularly utilized as guard dogs and in police work. They have a strong protective instinct toward their masters. However, they can get along with children and other dogs if they are raised with strong leadership and excellent owners.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\nTested<\/strong><\/td>Passed<\/strong><\/td>Failed<\/strong><\/td>Percent That Passed<\/strong><\/td><\/tr>1,733<\/td> 1,371<\/td> 359<\/td> 79.1%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nStatistics from the American Temperament Test Society (ATTS)<\/em><\/p>\n\n\n\n#5. Dalmatian<\/span><\/h3>\n\n\n\nThe AKC classifies the Dalmatian as a medium-sized dog in the “working” category. They weigh between 45 and 60 pounds and have short, dense, lustrous coats that are white with black or brown markings.<\/p>\n\n\n\n
Dalmatians must be socialized from a young age. They are nice to youngsters, but if their owner does not give them enough care, they can develop behavioral issues.<\/p>\n\n\n\n
So they are exceptionally active dogs who require frequent opportunities to expend some of their energy through exercise and play.<\/p>\n\n\n\n
Therefore, they can be classified as the most aggressive dogs.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\nTested<\/strong><\/td>Passed<\/strong><\/td>Failed<\/strong><\/td>Percent That Passed<\/strong><\/td><\/tr>358<\/td> 291<\/td> 59<\/td> 81.3%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nStatistics from the American Temperament Test Society (ATTS)<\/em><\/p>\n\n\n\n#6. Rottweiler<\/span><\/h3>\n\n\n\nThe Rottweiler is classified as a large dog in the “working” category.<\/p>\n\n\n\n
They can weigh between 85 and 130 pounds and have short-haired coats with straight, dense coats that are usually black with rust or mahogany patterns.<\/p>\n\n\n\n
Rottweiler takes its name from the German town of Rottweil. <\/p>\n\n\n\n
It was originally called the “Rottweil butcher’s dog,” but later, the term was shortened to Rottweiler. They were once employed for cattle herding and bear hunting, among other things. <\/p>\n\n\n\n
Later, they were famous as security dogs in the United States, and many worked with the army and police forces.<\/p>\n\n\n\n
Rottweilers can be distant and do not normally get along well with strangers. They are extremely protective of their owners and would defend their home grounds at all costs. <\/p>\n\n\n\n
They are usually kind to children, but they are not good for families with newborns or toddlers because of their size and high energy level.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\nTested<\/strong><\/td>Passed<\/strong><\/td>Failed<\/strong><\/td>Percent That Passed<\/strong><\/td><\/tr>5,866<\/td> 4,954<\/td> 915<\/td> 84.5%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nStatistics from the American Temperament Test Society (ATTS)<\/em><\/p>\n\n\n\n#7. Jack Russell Terrier<\/span><\/h3>\n\n\n\nThe AKC does not recognize the Jack Russell Terrier breed due to opposition from the breed’s parent society, the Jack Russell Terrier Club of America (JRTCA). <\/p>\n\n\n\n
As a result, the Parson Russell Terrier has been recognized instead. There are some minor differences between the Jack Russell terrier and the Parson Terrier.<\/p>\n\n\n\n
Jack Russells are small dogs that weigh between 14 and 18 pounds and are predominantly white with black or tan markings.<\/p>\n\n\n\n
Jack Russells were developed in England for fox hunting but have also been used for groundhog and badger hunting.<\/p>\n\n\n\n
Russell Terriers are energetic and aggressive dogs. They have little patience and are not child-friendly. Most experts advise families with young children to choose another breed, particularly if they are first-time dog owners.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\nTested<\/strong><\/td>Passed<\/strong><\/td>Failed<\/strong><\/td>Percent That Passed<\/strong><\/td><\/tr>68<\/td> 58<\/td> 10<\/td> 85.3%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nStatistics from the American Temperament Test Society (ATTS)<\/em><\/p>\n\n\n\n#8. German Shepherd<\/span><\/h3>\n\n\n\nThe AKC classifies the German Shepherd as a medium-sized breed in the “herding” category. <\/p>\n\n\n\n
They weigh between 70 and 85 pounds and have fur that is a combination of brown, gray, black, and tan.<\/p>\n\n\n\n
During World War I, both the German and French armed services utilized them as war dogs. They are an extremely clever breed that was the first to be employed as guide dogs for the blind. They are also widely utilized in search-and-rescue teams and as police and narcotics dogs.<\/p>\n\n\n\n
The German Shepherd has become one of America’s most popular canines. Because they dislike outsiders, they make excellent guard dogs. <\/p>\n\n\n\n
Despite being listed on numerous “violent dog” lists, everything I’ve read and experienced tells me that they’re great with kids. I do not consider German Shepherds to be an “aggressive” breed as long as they are not trained as guard dogs.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\nTested<\/strong><\/td>Passed<\/strong><\/td>Failed<\/strong><\/td>Percent That Passed<\/strong><\/td><\/tr>3,318<\/td> 2,827<\/td> 494<\/td> 85.2%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nStatistics from the American Temperament Test Society (ATTS)<\/em><\/p>\n\n\n\n#9. American Staffordshire Terrier\/Pit Bull Terrier<\/span><\/h3>\n\n\n\nThe American Staffordshire Terrier, also known as the American Pit Bull Terrier, is a medium-sized dog that belongs to the “terrier” breed and typically weighs between 55 and 65 pounds.<\/p>\n\n\n\n
They originated in the English county of Staffordshire, hence the name. <\/p>\n\n\n\n
The earliest strain of this breed was bred to have stronger, stockier frames to be used as guard dogs and in dogfighting. <\/p>\n\n\n\n
When the breed was introduced to America and dogfighting was outlawed, the second strain of this breed emerged. This new variant was gentler and smaller in stature. This younger pitbull breed, the American Pit Bull, is particularly loyal and protective of its owner and family.<\/p>\n\n\n\n
They are also excellent and tolerant with children, but if you are unsure about a pit bull’s pedigree, do a background check before deciding on it as a family pet.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\n<\/td> Tested<\/strong><\/td>Passed<\/strong><\/td>Failed<\/strong><\/td>Percent That Passed<\/strong><\/td><\/tr>American Pit Bull Terrier<\/strong><\/td>913<\/td> 798<\/td> 115<\/td> 87.4%<\/td><\/tr> American Staffordshire Terrier<\/strong><\/td>716<\/td> 610<\/td> 106<\/td> 85.2%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nStatistics from the American Temperament Test Society (ATTS)<\/em><\/p>\n\n\n\n#10. The Siberian Husky<\/span><\/h3>\n\n\n\nThe AKC classifies the Siberian husky as a medium-sized dog in the “working” category.<\/p>\n\n\n\n
They weigh between 35 and 70 pounds and have medium-length hair with a double coat. Their colors are red and white, black and white, gray and white, or silver.<\/p>\n\n\n\n
They were developed in Siberia to pull sleds over long distances in harsh climes. They’ve also been utilized as search and rescue dogs.<\/p>\n\n\n\n
I cannot find definitive studies that confirm huskies have aggressive personalities based on my study and experience owning four Siberian huskies. Still, they have been on numerous lists of aggressive dogs, which is why they are on this one. <\/p>\n\n\n\n
Huskies, in my experience, are territorial and do not always get along with other dogs, but they are usually nice with children.<\/p>\n\n\n\n
They’re among the most aggressive dogs in the world.<\/p>\n\n\n\n
Temperament Test Results<\/strong><\/p>\n\n\n\n