5 Medium-Sized Guard Dogs For Personal Protection

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Meet the unsung heroes of home security: medium-sized guard dogs! Perfectly sized for both cuddles and protection, these loyal companions bring the best of both worlds. They’re not just pets; they’re fearless family members, ready to keep you safe while fitting perfectly into your home life.

Whether you live in an apartment or have a backyard, these guard dog breeds prove that when it comes to guardians, size isn’t everything. Get ready to discover your family’s new best friend and fearless protector!

Medium-Sized Guard Dogs

Discover the perfect balance of affection and protection with our top picks for the best medium-sized guard dogs.

1. Chow Chow

Group Non-sporting
Origin China
Weight 45-70 pounds
Height 17-20 inches
Life span 8-12 years

Chow Chows are exceptional guard dogs, a trait rooted in their history of guarding Asian palaces. Known for their protective and sometimes temperamental nature, they tend to be independent and may not quickly warm up to new people.

With a strong instinct to guard, they are usually wary of strangers and fiercely loyal to their owners, often barking to alert them of any perceived threats. This breed is known for being quite vocal and may bark more than others. Chow Chows can also be territorial and show aggression towards other pets, especially their own kind.

However, with proper socialization and training, they can learn to manage these tendencies. It’s important to note that Chow Chows are not the easiest dogs to train, requiring patience and consistent guidance.

Chow Chows are well-suited for apartment living due to their low-energy nature and preference for cooler indoor environments, given their sensitivity to heat. Often likened to cats because of their independent demeanor, they are comfortable spending time alone in an apartment while you’re out.

2. Standard Schnauzer

medium guard dogs
Group Working
Origin Germany
Weight 30-50 pounds
Height 17.5-19.5 inches
Life span 13-16 years

The Standard Schnauzer, nestled between its smaller and larger breed counterparts, is a medium-sized dog known for its strength, sturdiness, and alert demeanor.

Renowned for being great with children, Standard Schnauzers are playful yet patient, making them excellent family pets. They’re also reliable watchdogs, quick to alert their families to any potential threats. While not as large as the Giant Schnauzer, they are formidable guard dogs when they perceive danger to their loved ones.

Their intelligence and spirited nature can make training a challenge, but with patience and consistency, they become well-behaved companions. Regular exercise and mental stimulation are key to keeping them content. Ideal for experienced pet owners, Standard Schnauzers are low on drooling but may dig or bark if bored.

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Positive reinforcement training and thorough socialization are vital in bringing out their best traits. The Standard Schnauzer’s size is versatile enough to allow them to thrive in various living situations. While a house with a yard is ideal, they can also adapt well to apartment living, provided they receive sufficient exercise.

3. Australian Cattle Dog

30-40 pound dog breeds
Group Herding
Origin Australia
Weight 35-50 pounds
Height 17-20 inches
Life span 12-16 years

Australian Cattle Dogs (ACDs) are highly reliable and possess a strong sense of duty. Known for their loyalty to their owners and caution around strangers, they make excellent guards and watchdogs, alerting their families to potential dangers without being excessive barkers. This breed is known for its protective nature, ready to defend its territory if it senses a threat.

Named ‘heeler’ due to their herding technique of nipping at cattle’s heels—a trait inherited from their dingo ancestry—the Australian Cattle Dog is an active, medium-sized breed. These intelligent dogs often outsmart their owners and are known for their strength and agility as herders.

ACDs have high energy levels and need plenty of exercise. Living in an apartment may require extra effort as they are happiest with a job or activity to keep them busy, as they can become destructive when bored. They are adaptable to various climates.

When it comes to socialization, Australian Cattle Dogs may be shy or aloof with new people and need regular socialization. Training is essential, especially with cats and other household pets, to ensure they coexist peacefully.

4. Shar-Pei

good protection dogs
Group Non-sporting
Origin China
Weight 45-60 pounds
Height 18-20 inches
Life span 8-12 years

The Shar Pei, a medium-sized breed with a distinctively wrinkled coat, is closely related to spitz breeds, particularly the Chow Chow. Originally bred for guarding livestock, Shar Peis are alert and intelligent and make excellent guardians. They are known for their calm and devoted demeanor, making them affectionate companions.

Shar Peis are very protective of their families and often patrol their property to watch for potential threats. They can exhibit aggression towards strangers entering their homes. Socializing them from an early age, especially around children, can enhance their friendliness and adaptability.

These dogs are suitable for apartment living due to their moderate space requirements, but potential owners should be mindful of their tendency to be vocal. Shar Peis are intelligent and generally require minimal training, responding well to consistent and positive training approaches.

5. Kerry Blue Terrier

best family dogs that are protective
Group Terrier
Origin Ireland
Weight 33-40 pounds
Height 17.5-19.5 inches
Life span 12-15 years

Originally bred for vermin control, the Kerry Blue Terrier evolved into a versatile working dog, adept at herding and guarding, making it an excellent watch and guard dog. This breed stands out as one of the larger terriers, with a compact, muscular build and a medium size.

Kerry Blue Terriers are not just strong and alert but also fiercely protective of their family and home, making them outstanding watchdogs. They are bred to be companionable and enjoy spending time with their human families.

While Kerries are affectionate with their owners, they may not always get along with other dogs, often displaying the feisty and assertive temperament typical of terriers. They are highly intelligent and learn quickly, responding well to training.

For exercise, Kerry Blue Terriers have higher needs. Owners should plan for at least two 30-minute walks daily, and possibly a third, especially for apartment dwellers without a backyard. This ensures they stay fit and mentally stimulated.


Medium-sized guard dogs stand out as some of the best in the realm of protection and companionship. Breeds like the vigilant Kerry Blue Terrier and the loyal Shar Pei exemplify what it means to be excellent guard dogs.

They may not have the imposing size of German Shepherds, yet their natural instinct to protect makes them equally effective. Each of these best guard dog breeds brings a unique blend of courage, intelligence, and affection, ensuring they’re not just good at guarding but are also cherished family members.

Whether you seek a steadfast guardian or a loving companion, these medium-sized guardians are undoubtedly among the best guard dogs to welcome into your home.

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