Dangerous Dogs: Definition, Legal Framework, and Classification

What does "designated breed" mean?

A "listed dog" is a dog that, under applicable state or federal law, is classified as potentially dangerous based on its breed or phenotype and is subject to specific regulatory requirements. The exact regulations vary significantly among the federal states in Germany. In Austria, state regulations requiring a certificate of competence and a temperament test apply, while in Switzerland, cantonal regulations apply.

Typical requirements include mandatory muzzling and leashing, proof of expertise, liability insurance, a temperament test, a clean record, official approval, and a maximum limit per owner. The term “listed dog” is legally established—but from a behavioral biology perspective, it is problematic because it is based on a premise that is scientifically controversial: that breed or phenotype is a reliable predictor of aggressive behavior.

Background and Academic Context

Breed lists were mostly created in the wake of high-profile biting incidents in the late 1990s and early 2000s. From the outset, the scientific validity of these lists was questioned. In one of the largest studies on aggressive behavior in dogs (n > 4,000), Casey et al. (2014) examined the relationship between breed and aggression. Result: Breed explains only a small portion of behavioral variance. Contextual factors—socialization, training, owner competence, individual temperament, and learning history—are more important.

Petkova et al. (2024) investigated public perceptions of breeds on the “dangerous dog” list and found that the phenotypic classification of a breed as “dangerous” is often unreliable. Even experts classify the same dog differently depending on how the images are presented. The authors also showed that dogs on the “dangerous dog” list systematically wait longer to be adopted from shelters—a problem for animal welfare.

Several studies from city-states show that bite statistics did not clearly decline following the introduction of breed-specific bans. The International Statistical Classification approach (Hsu & Sun 2010) demonstrates that “biting dogs” constitute a highly heterogeneous group. The ESVCE (European Society of Veterinary Clinical Ethology) rejects blanket bans as scientifically unsound.

Vitomalia-Position

At Vitomalia, we oppose blanket bans based on breed or phenotype. Instead, we recommend a “do-not-breed” model: assessment based on individual behavior and owner competence, not on genetic assumptions. Temperament tests, proof of expertise, and owner liability insurance are useful tools—but they should be breed-neutral.

Let us be clear: Owners of dogs on the list must be familiar with and comply with the regulations in effect in their state or canton. What we are criticizing is the scientific basis for the lists, not the individual legal situation. From an animal welfare perspective, the longer waiting periods for rehoming and the stigmatization of the affected dogs are problematic—with consequences for their well-being and quality of life.

When does the list of designated dogs come into play?

This classification becomes relevant in several situations: when adopting a dog from a shelter, when moving to another state with different regulations, when traveling with your dog (see also travel regulations), during official inspections, and when choosing a dog training school. Some dog training schools offer special programs for dogs on the list—see temperament test.

Practical application

Check the legal situation where you live: Which state or canton? Which breeds are affected?
Check the requirements: training, muzzle, leash requirement, liability insurance, and, if applicable, a temperament test.
Building a positive association with a muzzle: Even when required by law, a well-fitting muzzle used with positive reinforcement promotes animal welfare—it is not a punishment (see Muzzle).
Socialization and Training: Structured training using non-punitive methods—solid basic training is especially valuable for dogs on the dangerous breeds list.
Veterinary evaluation: Rule out pain and health issues when behavioral changes occur.
Documentation: Certificate of Competence, Certificate of Non-Conformity, and Liability Insurance must be properly maintained.

Common Mistakes and Myths

“Dogs on the list are more dangerous.” This claim is not supported by scientific evidence. Casey et al. (2014) and Petkova et al. (2024) refute this sweeping conclusion. Aggression is multifactorial.
“Identification is unambiguous.” Wrong. Even experts classify the same dog differently (Petkova 2024). Genetic tests often reveal surprises.
“Dogs on the list require particularly strict training.” Wrong. Aversive methods are counterproductive for any dog (Vieira de Castro 2020)—and particularly risky for reactive dogs with a history of biting.
“Bans make the city safer.” This claim is not supported by empirical evidence. Several studies show no clear decline in dog bite incidents following the introduction of the ban.
“My dog is on the dangerous dog list, so he can’t join puppy classes.” Depending on the country and the dog’s socialization needs, there are ways to make it work. Socialization is especially crucial for these dogs—not in spite of, but because of their status on the list.

State of the art in 2026

Consensus in behavioral biology and veterinary medicine: Aggression is multifactorial and cannot be predicted by breed. Blanket bans are not scientifically sound. The ESVCE and several national veterinary associations reject them. In practice, however, lists remain legally binding—owners must comply with them. Initial evidence suggests that “do-not-breed” models (Calgary, Netherlands) yield comparable or better safety outcomes than breed-specific lists. Open questions concern the effectiveness of various requirements and the role of targeted owner education.

Frequently Asked Questions

Which dogs are classified as dangerous breeds in Germany?

This varies by state. Breeds typically affected include American Staffordshire Terriers, Staffordshire Bull Terriers, Pit Bull Terriers, and their crossbreeds. Some states list additional breeds.

Do I need a temperament test?

In most states, yes, often in combination with a certificate of competence. Requirements vary—be sure to check with the relevant authority well in advance.

Are dogs on the banned list really more aggressive?

Not supported by scientific evidence. Petkova et al. (2024) and Casey et al. (2014) show that behavior cannot be attributed to race. Socialization, upbringing, and individual factors are more significant.

What should I do if I move?

Before moving, check the legal requirements at your destination. Some states or cantons have stricter rules—with serious consequences for both owners and dogs.

Related terms

Sources and further reading

Petkova, T., et al. (2024). Public perception of breed-specific legislation and so-called dangerous dog breeds. Animals, 14(7), 1052.
Casey, R. A., Loftus, B., Bolster, C., Richards, G. J., & Blackwell, E. J. (2014). Human directed aggression in domestic dogs – Occurrence in different contexts and risk factors. Applied Animal Behaviour Science, 152, 52–63.
Hsu, Y., & Sun, L. (2010). Factors associated with aggressive responses in pet dogs. Applied Animal Behaviour Science, 123(3–4), 108–123.
Vieira de Castro, A. C., Fuchs, D., Morello, G. M., et al. (2020). Does training method matter? Evidence for the negative impact of aversive-based methods. PLoS ONE, 15(12), e0225023.
Bradshaw, J. W. S., Blackwell, E. J., & Casey, R. A. (2009). Dominance in domestic dogs – useful construct or bad habit? Journal of Veterinary Behavior, 4(3), 135–144.