10 Small Dog Breeds That Don’t Get Along With Other Dogs & 10 Others That Are Everybody’s BFF

Some dogs were born to be social butterflies, while others would rather be the only pup at the party.

If you’ve ever taken your dog to the park only to watch them completely ignore—or worse, challenge—every other four-legged friend in sight, you’re not alone.

Just like people, dogs have personalities that run the full spectrum. Some are naturally friendly and eager to mingle, while others prefer a quiet corner and a familiar face (or no company at all, thank you very much).

When it comes to small dog breeds, it’s easy to assume that their tiny size means easygoing behavior. But don’t be fooled—many pint-sized pups pack a surprising amount of attitude and can be surprisingly particular about their playmates.

In fact, some of the smallest breeds are the biggest divas when it comes to getting along with other dogs. On the flip side, plenty of little dogs are charmers who make friends wherever they go.

These are the dogs that light up the dog park, happily wagging their tails and bouncing from pup to pup like the life of the canine cocktail party.

Whether you’re thinking about adding a second dog to your home or just trying to decode your current pup’s social quirks, it helps to know which breeds are natural-born companions—and which ones might need a little extra patience (and maybe a buffer zone).

In this guide, we’ll walk you through 10 small dog breeds that tend to clash with their canine peers, followed by 10 that are basically everyone’s best friend.

Think of it as your cheat sheet to small-dog social dynamics—helpful, honest, and maybe even a little surprising.

1. Chihuahua

Ever met a dog with the heart of a lion but the body of a mouse? That’s the Chihuahua for you. Despite their small stature, these dogs are fiercely loyal to their human companions and often act as self-appointed guardians.

They can be quite territorial, especially when it comes to sharing their favorite human’s attention. This can lead to some tension when other dogs are around.

Chihuahuas tend to consider themselves much larger than they are, often challenging dogs several times their size.

Their boldness can be charming, but it also means they may not always make the best roommates with other pets. Introductions to new dogs should be handled with care to ensure harmony in the household.

2. Dachshund

Dachshunds might look like they’re all fun and games with their long bodies and short legs, but don’t let that fool you. Their history as hunters means they have a strong personality and a tendency to assert dominance.

This breed can be quite headstrong and willful, which might not mesh well with other dogs who challenge them. Dachshunds often want to be the leader of the pack, and they won’t hesitate to let other dogs know.

In a multi-dog household, their playful charm can sometimes turn into competitive behavior, especially around food or toys. A bit of training and socialization goes a long way in keeping their relationships friendly.

3. Pekingese

With a face that could melt a heart, the Pekingese carries itself with an air of nobility. These little dogs have a big sense of pride and are known to be quite independent.

They often prefer the company of humans over other dogs, viewing themselves as the royalty of the household. Pekingese can be quite opinionated and may not appreciate other dogs infringing on their space.

Their aloofness can sometimes come off as grumpy, especially if they feel disrespected. Proper introductions and a calm environment can help them live peacefully with others.

4. Miniature Pinscher

The Miniature Pinscher might be small, but it’s packed with confidence and energy. Often referred to as the “King of Toys,” this breed is spirited and determined.

They have a strong-willed nature and can be quite bossy, especially if they sense a lack of leadership. This assertiveness can cause friction with other dogs who aren’t willing to submit.

Despite their size, Min Pins often believe they’re larger than life, taking on challenges head-on. Socialization and training can help channel their energy positively, ensuring a harmonious living situation.

5. Shih Tzu

Despite their cuddly appearance, Shih Tzus have a mind of their own. These dogs are known for their affection towards humans but can be less tolerant of other dogs.

They sometimes become jealous if they have to share their favorite person with another pet. This breed can be quite vocal if they feel they’re not getting enough attention.

Socialization from a young age can help them become more accepting of other dogs. Patience and understanding go a long way in managing their sometimes snippy behavior.

6. Lhasa Apso

Originally bred to be watchdogs in Tibetan monasteries, Lhasa Apsos have a strong sense of duty. They are naturally suspicious of strangers, whether they’re human or canine.

This breed has an independent streak and doesn’t always appreciate the antics of other dogs, especially if they feel their territory is being invaded. Lhasas are known for their aloof demeanor.

However, with the right socialization, they can learn to tolerate other dogs. Their loyalty to their owners is unmatched, and they often take their role as protectors very seriously.

7. Papillon

The Papillon is a small dog with a big heart and intelligence to match. Known for their distinct butterfly-like ears, these dogs love their human families deeply.

However, their cleverness can sometimes lead to possessiveness, especially over their favorite toys or spaces. This can create challenges when living with other dogs.

With consistent training and socialization, Papillons can learn to share and coexist peacefully. They’re quick learners, which makes teaching them new behaviors a rewarding experience for both dog and owner.

8. Pomeranian

Pomeranians are small but mighty, often acting like the biggest dogs on the block. Their fluffy coats and alert expressions make them look perpetually curious.

These dogs are known for their boldness and can be quite vocal, especially if they feel threatened or challenged by other dogs. This sometimes leads to confrontations.

While they may bark more than bite, their fearless nature can cause tension with larger or equally confident dogs. Socialization is key to helping them fit into a multi-dog household.

9. Japanese Chin

Japanese Chins carry themselves with an elegance that makes them appear almost cat-like in their demeanor. They often form strong bonds with their human companions.

These dogs enjoy a quiet, serene environment and may shy away from overly excitable or hyper dogs. This preference for tranquility can make them seem aloof.

Despite this, with patience and proper socialization, they can learn to tolerate other dogs. Their quirky personalities make them unique companions, and they thrive in calm, stable settings.

10. Scottish Terrier

Scottish Terriers, or Scotties, are known for their independent and determined nature. They often prefer solitary play over group activities.

These dogs have a strong sense of pride and may not always get along with other dogs, especially those who are too boisterous. Their loyal nature means they often form strong bonds with their human family.

While they can be stubborn, with the right approach, Scotties can learn to peacefully coexist with other pets. They thrive in environments where their independence is respected.

11. Cavalier King Charles Spaniel

With a heart full of love, the Cavalier King Charles Spaniel is known for its gentle and affectionate nature. They thrive in the company of humans and other dogs alike.

Cavaliers are incredibly adaptable and often become the peacekeepers in a group of pets. Their warm disposition makes them perfect companions for families, including those with children.

These dogs are always eager to make new friends, wagging their tails with joy at the sight of both familiar and unfamiliar faces. Their friendliness knows no bounds, making them beloved in any setting.

12. Bichon Frise

Bichon Frises are the social butterflies of the dog world, always ready to spread cheer wherever they go. Their playful and adaptable nature makes them perfect for families and multi-dog homes.

These dogs thrive on interaction and are usually the life of the party, eager to make new friends, whether they’re human or canine. Their fluffy coats and bright eyes make them irresistibly charming.

Bichons are known for their friendly demeanor, rarely showing aggression. They’re always up for a playdate at the dog park, spreading happiness and wagging tails.

13. Havanese

Havanese are the ultimate charismatics, with a friendly nature that makes them popular among dogs and humans alike. They love to be the center of attention and are always ready for a cuddle or a play session.

Their adaptable nature makes it easy for them to fit into various social situations. These dogs are known for their playful antics and are often seen frolicking with their canine pals.

Whether at home or at the park, Havanese are always eager to spread joy and love, making them wonderful companions in any setting.

14. Boston Terrier

Boston Terriers, with their stylish tuxedo-like coats, bring a lively yet polite energy to any group. Known as the “American Gentleman,” they charm everyone with their sociable demeanor.

These dogs are always ready for a game or an adventure, making them popular in multi-dog households. They balance fun with manners, ensuring a harmonious environment.

Boston Terriers are great at reading social cues, often diffusing tension and bringing unity wherever they go. Their joyful spirit is infectious, and they love being part of the family activities.

15. Maltese

Maltese dogs are like little clouds of joy, spreading happiness wherever they go. Despite their posh appearance, they’re incredibly friendly and sociable.

These dogs are known for their adaptability, getting along with dogs of all shapes and sizes. Their gentle nature makes them excellent companions in families and among other pets.

With their playful spirit and warm heart, Malteses are often the charmers of any group. They’re always ready to share their joy and become everyone’s friend.

16. Toy Poodle

Toy Poodles are as smart as they are charming, often impressing with their quick wit and ability to learn new tricks effortlessly. Their intelligence makes them excellent companions in any social setting.

These dogs are friendly and quick to pick up on social cues, ensuring they’re well-liked by other dogs and humans. Their adaptable nature allows them to thrive in diverse environments.

Always eager to please, Toy Poodles bring joy and excitement to those around them. Their playful antics and loving nature make them favorites at gatherings.

17. Brussels Griffon

Brussels Griffons are little packages of love, known for their affectionate nature and quirky personalities. Their distinctive bearded faces add to their charming appeal.

These dogs adore companionship, whether it’s from their human families or fellow canines. They’re typically drama-free and enjoy peaceful coexistence with other pets.

Their playful and affectionate demeanor makes them popular in households with multiple dogs, as they’re always ready to spread love and joy. Brussels Griffons are truly delightful companions.

18. Cairn Terrier

Cairn Terriers bring a lively energy to any group, often leading the charge in playful activities. While some terriers can be temperamental, Cairns are generally good-natured and friendly.

They enjoy the company of other dogs and are adaptable to various social settings. Their adventurous spirit makes them fun companions, eager to explore and engage in new activities.

In multi-dog homes, Cairn Terriers are often seen as team players, ensuring that everyone has a good time. Their cheerful disposition is contagious, making them beloved by all.

19. Border Terrier

Border Terriers are the social adventurers of the dog world, always ready for fun and exploration. Their outgoing nature makes them excellent companions in multi-dog households.

These dogs prefer play over confrontation, often diffusing tension with their easygoing personalities. They’re the kind of dogs that get along with just about everyone.

Their love for adventure and exploration makes them beloved members of any group, whether it’s a human family or a group of furry friends. Border Terriers are always up for a new adventure.

20. Cockapoo

Cockapoos are the charming result of a Cocker Spaniel and Poodle mix, bringing together the best of both breeds. Known for their friendliness and playfulness, they’re often seen as the perfect family dogs.

These dogs have excellent social skills, getting along well with other dogs and humans alike. Their joyful nature makes them favorites in any setting, spreading happiness wherever they go.

With a love for play and cuddles, Cockapoos are always ready to join in on family fun. Their curly coats and wagging tails add to their endearing appeal.