What Are the Unfriendliest Dog Breeds? A 2025 Owner Survey Reveals Surprising Truths

When potential dog owners dream of their perfect companion, friendliness tops many wish lists. But what the unfriendliest dog breeds actually are might surprise you. According to a comprehensive survey of 5,000 American dog owners conducted by Talker Research for Forbes Advisor, certain breeds consistently display reserved, protective, or independent temperaments that make them less immediately welcoming to strangers and unfamiliar situations.

The survey examined the 25 most popular breeds recognized by the American Kennel Club, measuring dog friendliness through a sophisticated framework that goes far beyond first impressions. While breed genetics play a significant role in personality development, early socialization and positive reinforcement training remain crucial factors that can shape even the most naturally aloof dogs into confident, well-adjusted companions.

The Unfriendliest Dog Breeds: Why Guardian Dogs Struggle with Strangers

The breeds that emerge as the unfriendliest according to owner responses share a common thread: they were historically bred to guard, protect, or work independently. This genetic predisposition explains much of their cautious approach to newcomers and their tendency to form tight bonds with family rather than seeking universal approval.

American Bulldog: The Protective Guardian (0.0 Score)

Ironically scoring at the bottom of the friendliness scale despite rankings as one of the most well-behaved breeds, the American bulldog displays a paradox of obedience without warmth. Only 44% of owners report their bulldogs happily accept treats or attention from strangers, and 16.3% indicate their dog rarely or never enjoys physical affection from others. This reserved nature stems not from aggression but from selective loyalty—these dogs prioritize their own family unit above all else.

Doberman Pinscher: The Elegant Protector (2.25 Score)

Known for fierce loyalty and commanding presence, the Doberman pinscher naturally maintains distance from unfamiliar faces. A striking 23.5% of owners describe their Dobermans as defensive with newcomers, and only 40% enthusiastically accept treats from strangers. Yet this protective instinct is precisely what draws experienced owners to the breed. With proper socialization, Dobermans become devoted family members who simply prefer their inner circle.

Rottweiler & Cane Corso: The Guardian Breeds (8.43 Score)

Rottweilers and Cane Corsos, both bred as working guard dogs, demonstrate the unfriendliest tendencies in their structured approach to social interaction. Nearly 20% of rottweiler owners report their dogs reject treats from strangers, and these breeds rank among the lowest in enthusiastically greeting newcomers warmly. The Cane Corso’s very name—translating from Latin as “bodyguard dog”—encapsulates this breed’s purposeful reserve. Only 26% of Cane Corso owners say their dogs warmly welcome new people, compared to the study average of 43% across all breeds.

Shih Tzu: The Exception Among the Unfriendliest (8.99 Score)

Breaking the pattern of large guardian breeds, the Shih Tzu emerges as the only small breed among the unfriendliest dog breeds in this analysis. This toy breed’s standoffish nature manifests differently than larger protective breeds—Shih Tzus simply prefer their own company and struggle with multi-dog households. Just 49.5% of owners report their Shih Tzus play well with other dogs, the lowest percentage across all 25 breeds studied.

The Friendliest Dog Breeds: The Polar Opposite

To fully understand what makes certain breeds unfriendliest, consider the stark contrast with top-scoring breeds. The Bernese Mountain Dog achieved a perfect 100.0 score, with only 0.5% of owners describing their dogs as unfriendly—matching the Golden Retriever’s exceptional sociability score. These breeds seem almost constitutionally incapable of meeting a stranger they don’t like.

The Labrador Retriever, AKC’s most popular breed for nine consecutive years, demonstrates why: 94% of owners rate their Labs as very or somewhat friendly, 75.8% report constant cuddling, and an impressive 75.3% enthusiastically accept treats from anyone. This is the opposite of the unfriendliest breeds, which typically show these behaviors at half the rate.

Even mid-ranking breeds like the Boxer and Great Dane display notably more approachable temperaments than their counterparts on the unfriendliest end of the spectrum. The Boxer scores 76.4 points largely because 73.5% of owners report their dogs happily accept attention from strangers—more than double the rate seen in least-friendly breeds.

Understanding the Science Behind Dog Friendliness

Forbes Advisor’s research employed a rigorous 10-factor assessment system, with each metric representing 10% of a breed’s total friendliness score:

• Comfort playing with other dogs (both positive and negative indicators)
• Enjoyment of physical affection and cuddling
• Receptiveness to treats and petting from strangers
• Enthusiasm greeting newcomers
• Owner perception of overall friendliness or unfriendliness

These metrics reveal a crucial insight: unfriendliest dog breeds aren’t inherently mean-spirited. Instead, they simply operate from different behavioral priorities. A protective breed’s reluctance to accept treats from strangers reflects discernment, not aggression. Their lower cuddling rates often indicate independence rather than coldness.

The 5,000-owner survey, stratified with 200 responses per breed, provides statistically robust findings. Yet the methodology itself highlights an important caveat: any dog’s actual friendliness depends significantly on factors beyond breed genetics, particularly early socialization and training approaches.

The Socialization Factor: Changing an Unfriendly Breed

It’s worth emphasizing that breed tendency doesn’t determine destiny. While some dogs emerge as the unfriendliest based on breed averages, individual dogs within those breeds may defy predictions through consistent positive reinforcement and early exposure to diverse social situations. A Rottweiler raised around children and strangers from puppyhood will likely behave far differently from one with limited social experience.

The gap between the friendliest and unfriendliest dog breeds narrows considerably when owners invest in early socialization. A Bernese Mountain Dog might naturally gravitate toward friendliness, but a properly trained Doberman or Rottweiler can match many traditionally friendly breeds in their responsiveness and affection once trust is established.

Choosing Your Breed: Beyond Friendliness

For potential dog owners, understanding the spectrum from friendliest to unfriendliest dog breeds serves as one data point among many. Some households specifically seek the protective independence that characterizes lower-scoring breeds. Families wanting a reliable guardian dog may deliberately choose an unfriendliest breed on this scale because their breed traits align with security needs.

Pet insurance considerations add another layer to the decision. Interestingly, several unfriendliest breeds—the Cane Corso, Rottweiler, and even the friendlier French Bulldog—rank among the most expensive to insure. Average pet insurance costs approximately $55 monthly for unlimited annual coverage with 90% reimbursement, though prices vary based on breed predispositions to specific health conditions.

The average veterinary visit costs around $61, but diagnostic procedures and unexpected illnesses can quickly escalate bills to thousands of dollars. For any breed, whether friendliest or unfriendliest, appropriate insurance coverage provides crucial financial protection.

Final Thoughts: Reframing Unfriendliness

The classification of unfriendliest dog breeds ultimately reflects how dogs interact with strangers and novel situations—not their capacity for deep bonds with their own families. Many owners of so-called unfriendly breeds would argue their dogs display profound friendliness in contexts where it matters most: with the people they love.

Understanding these breed tendencies empowers prospective owners to make informed decisions aligned with their lifestyle and expectations, choosing companions whose natural temperaments complement their own lives rather than fighting against genetic predisposition.