15 Reactive Dogs That Are A Danger To Your Other Pets

Thinking about adding another furry friend to your household? Before you go full-on Noah’s Ark and start pairing your pup with a cat, rabbit, or even another dog, there’s something important you should know.

Not all dogs are ready to play nice—and some breeds, no matter how cute, just don’t make good roomies.

Reactive dogs can be loving, loyal, and smart, but they’re also high-stress in the wrong situations. They might snap, chase, growl, or go full alpha on other pets just for existing in their line of sight.

It’s not personal—it’s instinct, and sometimes that instinct is impossible to override.

Whether it’s a sky-high prey drive, a history of selective breeding, or an intense need to protect their turf, these dogs often see other animals as either rivals or playthings (and not in the fun, squeaky-toy way).

Sure, training and socialization help, but they’re not cure-alls. Some dogs just aren’t wired to live in a multi-pet household, and that’s okay—as long as you know what you’re signing up for.

This list isn’t meant to demonize any breed. Every dog is an individual, and with the right structure, some can overcome their reactive tendencies.

But if you’re a proud cat parent, rodent lover, or planning to adopt multiple dogs, it’s best to do your homework first.

We’re not here to sugarcoat things—bringing the wrong breed into the wrong home can turn your peaceful pad into a pet warzone. And no one wants to referee a fur-flying, tail-thrashing showdown in the living room.

So, leash up your curiosity and let’s walk through 15 reactive dog breeds that might be a danger to your other pets.

1. Akita

With their powerful presence and unwavering loyalty, Akitas are a force to be reckoned with.

They are known for their devotion to family, but this can sometimes manifest as extreme territorial behavior. This breed doesn’t take kindly to unfamiliar animals, especially dogs of the same sex.

Their aloof demeanor can be mistaken for calmness, but it’s actually a marker of their wariness. Akitas require firm training and socialization to manage their reactivity.

Without it, they might see other animals as intruders.

It’s crucial to introduce them to other pets gradually and under supervision. Akitas have a strong prey drive, which makes them unsuitable companions for smaller animals.

This breed thrives in an environment where they are the only pet, getting all the attention they crave.

2. Chow Chow

With a regal stance and a lion-like mane, the Chow Chow is often seen as aloof and independent. Their dignified nature can quickly turn into reactivity when they feel cornered.

These dogs don’t usually mingle well with other pets, preferring their own company.

Chow Chows are not the best choice for a household with smaller animals. They may view them as prey, especially due to their strong hunting instincts.

Their stubbornness can be challenging, requiring a patient owner who can handle their temperament.

Proper socialization is key but might not completely curb their natural tendencies. Keeping them on a short leash, both figuratively and literally, is often recommended to ensure harmony in a multi-pet home.

3. Jack Russell Terrier

Jack Russell Terriers are small but mighty, with a feisty personality that matches their hunting heritage. Bred to chase, these terriers have a strong prey drive that makes them a challenge in homes with smaller animals.

Their boundless energy and curiosity can lead them into trouble, especially if they become fixated on a family cat or rabbit. It’s this tenacity that makes them both endearing and exasperating.

Training and socialization can help, but owners must be vigilant. Their instinct to chase and hunt is deeply ingrained, making them more suited to homes where they can be the sole ruler of the roost.

4. Belgian Malinois

Highly intelligent and driven, the Belgian Malinois is a top choice for police and military work, but this drive can be overwhelming in a family setting. Lacking proper socialization, they may become dominant and reactive towards other animals.

This breed requires mental and physical stimulation to curb its reactivity. Without it, their high energy can turn into aggression, especially towards unfamiliar pets.

Belgian Malinois are not for the casual dog owner. They thrive on structure and discipline, making them better suited for homes that can accommodate their demanding nature.

Their protective instincts are commendable but can be intimidating in a multi-pet household.

5. Shiba Inu

Known for their fox-like appearance and spirited personality, Shiba Inus are as independent as they come. This breed’s stubborn nature can make them reactive toward other dogs, especially when their personal space feels threatened.

Shibas have a strong prey drive, making them unsuitable around cats or small animals. Despite their size, they don’t back down from a confrontation, often surprising larger dogs with their courage.

Early socialization is crucial, but even then, they prefer to be the center of attention. Shiba Inus are best suited for owners who can appreciate their quirks and manage their interactions with other pets carefully.

6. Dachshund

Despite their small stature, Dachshunds have the heart of a hunter. Originally bred to hunt badgers, these dogs are fearless and determined, traits that can lead to reactivity around other pets.

They are naturally territorial and can become aggressive if they feel their space is being invaded. Dachshunds often see larger dogs as challenges rather than threats.

With proper training and socialization, their reactivity can be managed, but they thrive as solo pets. Owners should be aware of their tenacious nature and ensure they have clear boundaries at home to prevent unwanted conflicts.

7. Siberian Husky

Siberian Huskies are known for their friendly demeanor towards humans, but their behavior towards other animals can be unpredictable. Their high prey drive makes them a risky choice in homes with small pets like cats or rabbits.

These dogs were bred to pull sleds, meaning they possess boundless energy and a strong instinct to run. This can translate into chasing smaller animals if they’re not properly managed.

Although socialization can help, Huskies often retain their instinctual behaviors. They require a dedicated owner who can provide ample exercise and guidance to ensure harmony within a multi-pet household.

8. Alaskan Malamute

Similar to their Husky cousins, Alaskan Malamutes are powerful and independent dogs. They have strong instincts to chase and assert dominance, making them a challenge in multi-pet homes.

Malamutes are not known for their willingness to share their domain with other animals unless they are raised together. Their pack mentality means they may try to establish themselves as the alpha.

Providing consistent training and socialization from an early age can mitigate some of these tendencies. However, they are generally best suited to being the solo canine in a household, enjoying the full attention of their human companions.

9. Australian Cattle Dog

Australian Cattle Dogs are known for their intelligence and protective nature. As herding dogs, they have a tendency to try to control other animals, which can lead to nipping and dominance issues.

Their high energy levels require constant stimulation, and without it, they might see other pets as targets for their herding instincts. This breed thrives in environments where their skills can be put to work.

Training and discipline are essential to managing their behavior around other animals.

For those who can match their energy and provide a job, Australian Cattle Dogs can be loyal and loving companions.

10. Basenji

Known as the “barkless dog,” the Basenji is anything but silent in personality. These alert and aloof dogs have a strong impulse to chase, making them a challenge in homes with smaller animals.

Their independent nature means they don’t always get along with other pets, preferring to do their own thing. Basenjis are known for their cat-like grooming habits and curious demeanor.

While socialization can help, owners should be prepared for a dog that may never fully integrate with other animals. They require a patient and understanding owner who can appreciate their unique quirks.

11. Doberman Pinscher

Loyal and loving to their humans, Doberman Pinschers can be a handful around other animals. Their protective instincts are strong, and they may become reactive if they feel threatened.

Dobermans require consistent training and socialization to ensure they are well-adjusted in multi-pet environments. Without it, their natural tendencies can become overwhelming.

Despite their reputation, Dobermans are intelligent and trainable, but they need a firm hand.

They are best suited for owners who can provide clear guidance and ensure they feel secure within their territory.

12. Weimaraner

Weimaraners, with their sleek appearance and boundless energy, were bred as hunting dogs.

Their drive and vitality make them a challenging match for homes with small pets.

They require extensive training and socialization to ensure they don’t see smaller animals as prey. Weimaraners are loyal and loving, but their hunting instincts are never far from the surface.

Owners must be prepared to provide ample exercise and guidance. This breed thrives in environments where they can expend their energy and follow clear, consistent rules.

13. Cane Corso

Powerful and protective, the Cane Corso is not a breed for the faint-hearted. Their dominant nature can lead to challenges in homes with other pets, particularly dogs of the same sex.

Cane Corsos need firm training to ensure they understand their place within the family hierarchy. Without it, they might challenge other pets, leading to potential conflicts.

For experienced owners who can provide the leadership they crave, Cane Corsos are loyal and loving companions.

They require an environment where they feel secure and can thrive under structured guidance.

14. Shar Pei

Shar Peis, with their distinctive wrinkles and wary nature, are naturally cautious around strangers and unfamiliar animals. Their stubborn nature and territorial instincts can make them a challenge in multi-pet households.

These dogs require early socialization to ensure they are comfortable around other animals, but their tendencies may still surface. Shar Peis are independent and often prefer their own company.

For those willing to invest time in training and understanding their unique personality, Shar Peis can be rewarding companions. They thrive in environments where their boundaries are respected and they feel secure.

15. American Bulldog

American Bulldogs are muscular and tenacious, known for their loyalty to their families. However, their reactive nature can pose a challenge in homes with other pets.

They require early training to ensure they understand their boundaries and don’t act aggressively when other animals enter their space. With proper guidance, they can learn to coexist peacefully.

For owners who can provide firm and consistent training, American Bulldogs are loving and protective companions. They thrive in homes where they feel secure and have clear rules to follow.