It’s not every day that you get bit by a dog, but these things do happen from time to time, and many people worry about which breeds are the most dangerous. According to the Center for Disease Control (CDC), more than 4 million people are bitten by dogs in the United States every year, and roughly 800,000 of those victims will seek medical attention.¹

Reliable dog bite statistics are hard to come by, mainly because very few institutions are tracking these incidents and categorizing them by breed. Therefore, we looked at a broad range of sources that gauge the likelihood of a dog breed to bite.

How We Compiled the List

To compile this list, we reviewed a list of fatalities caused by dog bites between 2005 and 2019 in the United States² and a controlled study on a breed’s likelihood to bite based on its potential to be dangerous to the public. For the controlled study, toy and small breeds were not included. Rather, it was a mix of 170 medium to large breeds that participated. The study took place in Northern Italy and was overseen by veterinarians and dog behaviorists. Eighty-seven out of the 170 dogs observed showed aggression towards humans.³

Important Note: Although the following list covers the breeds that, through reports and statistics, feature highly in terms of bite incidents, it is important to note that the dogs that are most likely to bite, regardless of breed, are:

Any dog of any breed can bite under the right (or wrong) conditions, but the following breeds have been identified as more frequent biters.

The 10 Dog Breeds Most Likely to Bite Humans

1. Pit Bull/Pit Bull Type Breeds

Pit Bulls and Pit Bull types are often the first breed people think of when it comes to biting humans. Over the recorded 14-year period, this breed type caused 346 fatalities. It is important to note that sometimes Staffordshire Terriers get lumped as Pit Bulls. According to the American Kennel Club, every American Staffordshire Terrier can be called an American Pit Bull, but it is not the same way around. So, those 346 fatalities could have been caused by a mix of breeds that resemble Pit Bulls.

In the controlled study, nine out of the 87 dogs that showed aggression toward humans were Pit Bull types (Pit Bulls and American Pit Bulls).

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2. American Staffordshire Terrier

As we discussed earlier, American Staffordshire Terriers often get categorized as Pit Bulls, so the study we used did not have specific statistics on them. We can only speculate that some of the 346 fatal bites were caused by Staffies based on what we learned from the controlled study on aggression. Seven out of the 87 aggressive dogs were American Staffordshire Terriers.

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3. Rottweiler

The next dog on our list is the Rottweiler. In the dog bite fatality stat compilation, Rottweilers fatally killed 51 people over that 14-year period. In the controlled study, six Rotties showed aggression towards humans.

Rottweilers are large, strong dogs bred to be cattle dogs. Over the years, their powerful jaws and protective instincts have made them one of the dogs most likely to bite a human. However, other studies show that while they are more likely to bite, that doesn’t necessarily mean that they are the most aggressive. In general, Rottweilers are well-behaved and social, and they have proper training.

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4. German Shepherd

It is probably not surprising to see German Shepherds on this list. These dogs are often used as police dogs in several countries and have quite a powerful bite force of 360.4 Newtons.⁴ The controlled study showed that 11 German Shepherds showed aggression toward humans. This breed was also responsible for 22 fatalities.

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5. Mixed Breeds/Crossbreeds

In the controlled study, mixed breeds made up 27.6% of aggressive tendencies towards humans (24 dogs out of 87). Of course, a mixed-breed dog can be almost anything, including a combination of the aforementioned breeds on this list. Mixed breeds accounted for 27 fatalities over the 14-year period.

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6. Mastiff

Unfortunately, the data compiled on fatal dog bites for this breed includes Italian, English, South African, and Neapolitan Mastiffs, Bullmastiffs, and Mastiff-mixes. This may be the same situation as Pit Bulls bite data. However, the Mastiff-type accounted for 18 fatalities.

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7. American Bulldog

American Bulldogs were bred to fight, so it is not surprising to see them on this list. They have been the cause of 16 fatalities. However, this breed was not included in the controlled study. The English Bulldog was, but only one showed aggression toward humans.

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8. Husky

Siberian Huskies are energetic and loving, but their temperament is wildly unpredictable. They have even been known to maul people instead of just biting them. Statistics showed that Huskies caused 14 fatalities. This breed was not featured in the controlled study.

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9. Labrador Retriever

It is shocking that this dog is featured on our list. Labrador Retrievers have been the most popular breed in the United States for years. However, nine have been involved in fatal attacks. This breed was not included in the controlled study, most likely due to its reputation for being friendly and good family dogs.

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10. Boxer

This is another dog breed that was bred as a bull baiter. The Boxer was featured in the study, noting that two of them showed aggression towards humans, and seven of them were involved in fatal attacks on humans.*

* The Boxer was included in a 2005 to 2017 study. 

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Other Breeds That Have the Potential to Bite Humans

The controlled study done in Northern Italy had some other dog breeds that showed aggression toward humans but were not included in the fatality stats. Here are those breeds that showed aggression in two to three people:

Conclusion

There really isn’t any reason to fear dogs just because of the breed that they are. If a dog is going to attack you, there are many underlying factors for that behavior, most of which have nothing to actually do with the breed itself. If you ever feel you are in danger of getting bit, try to remain calm and separate yourself if possible.

• See Also: Does Your Dog Get Hangry? Vet Approved Facts & What to Do

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Featured Image Credit: Victoria Antonova, Shutterstock