Dog Attacks and Bites Statistics by Breed

Dog bite statistics are among the most contested datasets in animal welfare and public health — and for good reason. The numbers are real, the injuries can be catastrophic, and the policy implications (breed-specific legislation, insurance exclusions, housing restrictions) affect millions of dog owners. But the data is also genuinely difficult to interpret: breed identification is unreliable, bite incidents are underreported, population denominators are unknown, and the causal relationship between breed and bite risk is more complicated than either advocates or critics of breed restrictions tend to acknowledge.

This article presents the most reliable available data on dog bites and fatalities by breed in the United States, drawing on CDC surveillance data, the American Veterinary Medical Association’s (AVMA) research summaries, peer-reviewed epidemiological studies, and the DogsBite.org fatality tracking database. Where the data is clear, it says so. Where it is ambiguous or contested, that is noted too.

Q: Which dog breed is responsible for the most fatal attacks? A: Pit bull-type dogs are identified as the breed involved in the largest number of dog bite fatalities in the United States in most tracking databases, including the DogsBite.org 20-year fatality study (2005–2024), which attributed approximately 66–68% of fatal dog attacks to pit bull-type dogs. However, researchers consistently note that “pit bull” is not a recognised breed but a loose category applied to multiple distinct breeds and mixed-breed dogs, that breed identification in media reports is frequently inaccurate, and that population size (denominator) data for pit bull-type dogs is unavailable, making true per-capita bite rates impossible to calculate.

1. The Scale of the Problem: How Many Dog Bites Happen Each Year

The United States has approximately 90 million pet dogs. Each year, approximately 4.5 million Americans are bitten by dogs, according to the CDC — a figure that has been broadly consistent across surveys for two decades. Of those 4.5 million bites annually:

• Approximately 800,000 require medical attention
• Approximately 350,000 result in emergency room visits
• Approximately 30,000 require reconstructive surgery
• Approximately 30–50 are fatal

Children are the most common victims of serious dog bites, with children aged 5–9 at the highest risk. Boys are bitten more frequently than girls at younger ages, a disparity that narrows in adolescence and adulthood. The elderly are the most common victims of fatal attacks, particularly elderly women living alone.

The economic burden of dog bites is substantial. The Insurance Information Institute estimates dog bite and dog-related injury claims cost US insurers approximately $1.1 to $1.3 billion annually, with the average cost per claim exceeding $64,000. Homeowners insurance covers the majority of these claims, which partly explains the intense interest of the insurance industry in breed-specific data.

2. The Data Sources and Their Limitations

Understanding dog bite statistics requires understanding what each data source actually measures and where its limitations lie.

CDC surveillance data: The CDC previously maintained a database of dog bite fatalities with breed identification, but discontinued this in the 1990s due to concerns about unreliable breed identification. Current CDC figures focus on overall bite incidence rather than breed breakdown.

DogsBite.org: A nonprofit advocacy organisation that has tracked US dog bite fatalities since 2005, assigning breed designations based on media reports, court records, and animal control reports. Their 20-year dataset (2005–2024) is the most comprehensive US fatality database available by breed. Critics note that DogsBite.org has an explicit policy position favouring breed-specific legislation, which may affect data interpretation if not the raw counts themselves.

AVMA and peer-reviewed research: The American Veterinary Medical Association has published extensive literature reviews on dog bite epidemiology. The peer-reviewed literature is more cautious about breed attribution than advocacy databases, emphasising the confounding effects of owner behaviour, dog history, training, and context.

State and local animal control records: Some jurisdictions maintain bite records with breed identification, but these are fragmented, inconsistently maintained, and not aggregated nationally.

Insurance industry data: Insurance companies maintain proprietary claims data that includes breed information where available. State Farm, Farmers, and other major homeowners insurers have published aggregate data on high-claim breeds, but methodology varies.

3. Fatal Dog Attacks by Breed: The Fatality Data

Fatal dog attacks are the most reliably tracked category because fatalities generate public records — death certificates, coroner reports, court records, and media coverage — that create a more complete dataset than non-fatal bites.

According to DogsBite.org’s analysis of 568 dog bite fatalities in the United States between 2005 and 2017 (the most-cited period of their published data):

• Pit bull-type dogs: Approximately 284 fatalities — ~65.6% of total
• Rottweilers: Approximately 45 fatalities — ~8.9%
• German Shepherds: Approximately 20 fatalities — ~3.5%
• Mixed breeds (non-pit bull): Approximately 17 fatalities — ~3.0%
• American Bulldogs: Approximately 15 fatalities — ~2.6%
• Mastiffs/Bullmastiffs: Approximately 14 fatalities — ~2.5%
• Huskies: Approximately 13 fatalities — ~2.3%
• All other breeds combined: ~11.6%

The dominance of pit bull-type dogs in the fatality data is consistent across multiple time periods and multiple analysts, including researchers who are critical of breed-specific legislation. This statistical pattern is not manufactured by advocacy groups — it appears in insurance claims data, hospital records, and legal databases as well.

However, three important caveats apply to interpreting these figures:

Breed identification is unreliable: Multiple studies — including research published in the Journal of Veterinary Behavior — have found that visual breed identification of dogs by shelter workers, veterinary professionals, and the public is inaccurate between 50–87% of the time when compared to DNA testing. A dog labelled as a “pit bull” in a news report may or may not be a pit bull type by any consistent genetic or morphological standard.

Population size is unknown: Without knowing how many pit bull-type dogs exist in the US relative to other breeds, bite rate per dog cannot be calculated. If pit bull-type dogs represent 20% of all dogs and 66% of fatalities, the per-dog risk is disproportionate. If they represent 40% of dogs (which some estimates suggest for urban populations), the per-dog rate looks different. We simply do not have reliable population denominators.

Context and owner factors confound breed: Research consistently shows that owner behaviour, training history, whether the dog has been abused or used in fighting, chaining or tethering, and the circumstances of the encounter are all significant predictors of bite severity — potentially more predictive than breed alone.

4. Non-Fatal Bites by Breed: A Different Picture

When the analysis shifts from fatal attacks to the broader universe of non-fatal dog bites, the breed pattern changes substantially. Non-fatal bites are less dominated by pit bull-type dogs than fatalities are, and several breeds appear disproportionately in non-fatal bite data that rarely appear in fatality data.

Studies of emergency room dog bite presentations and insurance claims data show a more distributed pattern across breeds:

• Labrador Retrievers, the most popular breed in the US for decades, appear frequently in non-fatal bite statistics in absolute numbers — not because they bite disproportionately but because there are so many of them
• German Shepherds appear consistently in both non-fatal ER data and postal worker bite reports (the USPS tracks dog bites on mail carriers, with German Shepherds appearing regularly in the top breeds)
• Chihuahuas and other small breeds bite frequently but rarely cause serious injury, so they appear in veterinary bite data more than in hospital or insurance data
• Cocker Spaniels and Jack Russell Terriers have appeared disproportionately in some bite frequency studies relative to their population size

The disconnect between bite frequency data and fatality data is a critical but underappreciated distinction: the breeds that bite most frequently are not the same as the breeds most likely to cause death or severe injury when they do bite. Bite force, body mass, and tenacity of attack are distinct variables from bite frequency.

5. What Drives Bite Risk: Breed vs. Individual and Environmental Factors

The scientific consensus, as articulated by the AVMA, the American Kennel Club, and the majority of peer-reviewed veterinary and public health researchers, is that bite risk is a multi-factorial outcome in which breed is one contributor among several — and not necessarily the most important one.

Factors consistently associated with elevated bite risk across multiple studies:

Dog-related factors:

• Male dogs (unneutered males are involved in disproportionately many serious attacks)
• Dogs with a history of prior aggression or abuse
• Dogs that are chained or tethered (tethered dogs are involved in approximately 25% of fatal attacks despite being a small fraction of the dog population)
• Dogs used in fighting or trained for protection without professional oversight
• Dogs that are ill, injured, or in pain

Human and context-related factors:

• Young children interacting with unfamiliar dogs without supervision
• Approaching a dog that is eating, sleeping, or caring for puppies
• Approaching a dog in its territory without the owner present
• Running from or making sudden movements toward an unfamiliar dog

Owner-related factors:

• Inadequate training and socialisation during the critical developmental window (8–16 weeks)
• Failure to supervise interactions with children
• Deliberate training for aggression

For more on the observable behavioural warning signs that a dog may be approaching an attack, 10 warning signs your dog might get aggressive and attack you covers the specific signals — body posture, vocalisation, and contextual triggers — that precede most dog attacks.

6. Breed-Specific Legislation: What the Evidence Shows

More than 900 US municipalities have enacted some form of breed-specific legislation (BSL), typically targeting pit bull-type dogs, Rottweilers, and sometimes Dobermans or Akitas. BSL ranges from outright bans to mandatory muzzling, sterilisation requirements, or enhanced liability insurance mandates.

The evidence on BSL’s effectiveness at reducing dog bite injuries is mixed at best. Several studies — including analyses from the Netherlands (which later repealed its national pit bull ban), Calgary, and various US jurisdictions — have failed to find significant reductions in bite rates following BSL implementation. The most commonly cited explanation is substitution: when restricted breeds become less accessible, owners seeking dogs for status or protection shift to other large breeds, and bite rates from those breeds increase to partially offset reductions from the restricted breeds.

Jurisdictions that have seen significant reductions in bite rates — Calgary being the most studied example — typically achieved those reductions through aggressive enforcement of general dangerous dog laws, licensing requirements, owner accountability measures, and public education, rather than breed-specific restrictions.

Major veterinary, public health, and animal welfare organisations that have issued statements against breed-specific legislation include the AVMA, American Animal Hospital Association, National Canine Research Council, and the CDC.

7. Insurance, Housing, and the Practical Consequences of Breed Data

Whatever the scientific debate about breed-specific risk, breed-based restrictions have practical consequences for millions of American dog owners. Approximately 75% of US homeowners insurers either exclude coverage for certain breeds or charge significantly higher premiums. The most commonly excluded breeds are:

• Pit bull-type dogs / American Pit Bull Terrier / American Staffordshire Terrier
• Rottweilers
• Doberman Pinschers
• German Shepherds (excluded by some but not most insurers)
• Akitas
• Chows
• Wolf-hybrids

Housing restrictions are similarly widespread. A significant proportion of US rental properties — particularly in multi-family housing — prohibit specific breeds or impose weight restrictions that effectively exclude large breeds. The practical consequence is that owners of excluded breeds often face housing instability, particularly in affordable housing markets, and may be forced to surrender their animals.

The practical impact of breed-based insurance and housing restrictions falls most heavily on lower-income dog owners who cannot afford the premium housing or specialised insurance products that accommodate their animals — creating a de facto class dimension to breed regulation that is rarely acknowledged in the public policy debate.

8. What the Statistics Actually Support

Reading the dog bite literature carefully, several conclusions are well-supported by the data and several popular claims — from both sides of the debate — are not.

Well-supported by data:

• Pit bull-type dogs are involved in a disproportionate share of dog bite fatalities in the US, and this pattern is consistent across multiple datasets and time periods
• Young children and the elderly are the highest-risk victims
• Unneutered male dogs and tethered dogs are significantly overrepresented in serious bite incidents
• Breed identification based on visual assessment alone is unreliable

Not well-supported by data:

• The claim that breed is irrelevant to bite risk — physical characteristics associated with bite severity (force, body mass, attack style) are real and vary by breed
• The claim that breed-specific legislation effectively reduces bite rates — the evidence for BSL effectiveness is weak to absent
• The claim that any single factor (breed, training, owner) fully explains bite risk — the research consistently shows multiple interacting factors

The most defensible position, supported by the weight of the evidence, is that breed is one risk factor among several, that it interacts with owner behaviour, training, and context, and that policies focused on individual dog and owner accountability produce better safety outcomes than breed-based restrictions alone.

For broader context on animal-related risks and how to interpret health and safety statistics accurately, death statistics by cause in the US provides a framework for understanding how different risks — including animal attacks — fit into the overall picture of American mortality and injury.