9 Dog Breeds That Can’t Stand Other Dogs

Understanding which dog breeds struggle with socialization is crucial for potential pet owners who already have dogs at home—or plan to introduce a second one. In this blog, we’ll explore 9 dog breeds that can’t stand other dogs, discuss the reasons behind their behavior, and offer tips for managing these strong-willed pups. If you’re considering one of these breeds, knowing their temperament can help you create a safer and happier environment for both your dog and others.

1. Chihuahua

Chihuahuas may be small in size, but their personalities are anything but. Known for their bold and feisty attitudes, Chihuahuas often exhibit aggressive behavior toward other dogs, especially if they feel threatened or challenged. This breed tends to form strong bonds with their owners and may act possessively, showing jealousy when attention is diverted. Their territorial nature often causes them to bark or lunge at other dogs, even those much larger than themselves.

This behavior is often the result of poor socialization in puppyhood or the “small dog syndrome,” where owners unintentionally allow bad habits due to the dog’s size. Chihuahuas do best in single-dog households or homes where they are introduced to other pets very early and consistently. They require patience and early training to reduce their anxiety and help them interact peacefully with other dogs. Without this effort, they can be difficult to manage around unfamiliar canines.

2. Dachshund

Dachshunds, also known as “wiener dogs,” were originally bred to hunt badgers and other burrowing animals, so it’s no surprise that they have a strong-willed and often stubborn temperament. These dogs are naturally assertive and sometimes aggressive, especially toward dogs they perceive as intruders or competitors. They are known to display territorial behavior, guarding their home, toys, and even food bowls from other dogs. This possessiveness, coupled with a high prey drive, often leads to confrontation.

Additionally, Dachshunds can become dominant if not properly trained, trying to assert themselves over other dogs in the household. Early socialization and firm but gentle training are crucial to help them accept the presence of other dogs. Without it, they may bark, growl, or snap at dogs in parks or even during walks. Their protective instincts, although beneficial in some settings, make them one of the more challenging breeds to have in a multi-dog environment.

3. Akita

Akitas are large, powerful dogs originally bred in Japan for guarding and hunting. These dogs are known for their loyalty and independence but can be very territorial and aggressive toward other dogs, especially those of the same sex. Akitas often have a strong dominance streak, making them naturally inclined to challenge other canines rather than coexist peacefully. They are usually very protective of their family and may view unfamiliar dogs as threats.

Due to their size and strength, aggressive behavior can be dangerous and difficult to manage. Akitas generally prefer to be the only dog in the household and require owners who are experienced with large breeds. Early training and controlled socialization can help to manage their instinctive aggression, but it’s not always guaranteed to eliminate the behavior. In many cases, Akitas are happiest and most manageable when they don’t have to share their space with other dogs.

4. Jack Russell Terrier

Jack Russell Terriers are highly energetic, intelligent, and strong-willed dogs that were originally bred for fox hunting. While their playful nature makes them great companions for humans, they often struggle to get along with other dogs. These terriers have a strong prey drive and a dominant personality, which can result in aggressive behavior toward other pets. Jack Russells are very territorial and can be extremely vocal and reactive when encountering other dogs.

They tend to see other animals as competition, especially if not properly socialized from a young age. Their need for stimulation and exercise also means they can become frustrated and aggressive if they don’t get enough attention, leading to misbehavior around other dogs. While some Jack Russells can coexist peacefully with other pets, especially if raised together, many do best as the only dog in the household. Training, supervision, and consistent boundaries are necessary to curb their dominant tendencies.

5. Shar Pei

The Chinese Shar Pei is a unique-looking breed known for its deeply wrinkled skin and strong, independent nature. Although very loyal to its human family, the Shar Pei tends to be wary of strangers and often shows aggression toward unfamiliar dogs. Historically bred for guarding and fighting, they have a naturally defensive temperament and can be highly territorial. They typically do not tolerate other dogs invading their space and may become hostile, especially with dogs of the same dog.

Shar Peis are not usually recommended for homes with multiple dogs unless raised with them from a young age and well-socialized. Even then, supervision is often needed. Their aloof attitude and stubborn streak make them less likely to respond to commands during moments of high excitement or aggression. Owners need to be confident, consistent, and experienced with dog behavior to properly manage a Shar Pei in social situations with other dogs.

6. Doberman Pinscher

Doberman Pinschers are intelligent, alert, and loyal dogs often used in police and protection work. While they are affectionate with their families, Dobermans can display dominant and territorial behavior, especially around unfamiliar dogs. Their natural instincts to protect can translate into aggression if they perceive other dogs as a threat to their humans or territory. In multi-dog households, Dobermans often try to assert dominance, which can result in conflicts, particularly with other dominant breeds.

Although early socialization and training can help reduce this tendency, it doesn’t completely eliminate their drive to lead or protect. Because of their physical power and high energy, Dobermans need owners who can establish strong leadership and provide consistent mental and physical stimulation. Left unchecked, their protective instincts can lead to serious altercations with other dogs. For this reason, they are best suited to being the only dog in the home or living with dogs they are raised with from puppyhood.

7. Alaskan Malamute

Alaskan Malamutes are strong, independent, and pack-oriented dogs that were bred for pulling sleds in harsh Arctic conditions. While they can be very friendly toward humans, their relationship with other dogs is often more complicated. Malamutes have a natural prey drive and a dominant nature, which can lead to aggression, especially toward dogs of the same sex. They often challenge other dogs in an attempt to establish dominance and are not known for backing down.

This breed can also become overly excited in social situations, leading to rough or aggressive play. Because of their size and strength, such interactions can quickly escalate into dangerous situations. Alaskan Malamutes do best in households with experienced dog owners who understand canine behavior and pack dynamics. While some can get along with other dogs, particularly if they are well-socialized from an early age, many Malamutes prefer to be the only pet to avoid power struggles and conflicts.

8. Shih Tzu

Shih Tzus are often perceived as sweet and docile lap dogs, but beneath their fluffy exterior lies a stubborn and occasionally aggressive temperament, particularly toward other dogs. Bred as companion animals for Chinese royalty, Shih Tzus often display a sense of entitlement and dislike sharing attention with other pets. While they typically bond well with their human families, they may bark, growl, or snap at unfamiliar dogs, especially if they feel their space is being invaded.

Shih Tzus can also become possessive of their toys, food, or owners, leading to confrontations with other pets in the home. Without early training and regular social exposure, these dogs may develop “small dog syndrome,” where they challenge larger dogs despite their size. Proper training, firm leadership, and socialization are key to helping a Shih Tzu coexist peacefully with other dogs. However, many Shih Tzus are happiest in a single-dog household where they can enjoy undivided attention.

9. Belgian Malinois

The Belgian Malinois is a highly intelligent and intense working dog often used in military and law enforcement roles. While extremely loyal and trainable, these dogs are not naturally sociable with other dogs. Belgian Malinois are known for their strong protective instincts, high energy, and territorial behavior. They tend to be wary of unfamiliar animals and may become aggressive if they sense a threat. Their strong prey drive can also make them reactive to smaller dogs or animals.

In multi-dog households, Belgian Malinois may attempt to dominate or control other dogs, especially if not properly trained or socialized. They require a significant amount of mental and physical stimulation, and without it, they may become restless and irritable, increasing the risk of aggressive behavior. Because of their demanding nature and tendency toward dog-on-dog aggression, this breed is best suited to experienced owners who can provide firm leadership and keep them well-exercised and mentally challenged.

Bottom Line

Some dog breeds simply prefer to fly solo. While early training and socialization can help reduce aggression or tension, certain breeds are hardwired to be dominant, territorial, or possessive around other dogs. Choosing the right breed for your household is essential—especially if you already have pets.

Whether you’re drawn to the loyalty of a Doberman or the feistiness of a Chihuahua, be sure to consider their tolerance for fellow canines before making a decision. A well-informed choice will lead to a more peaceful and rewarding relationship for both you and your furry friend.