Bullmastiff vs Shiba Inu

Which dog breed is right for you?

Bullmastiff

Size
100–130 lbs, 24–27 in
Lifespan
7–9 years
Exercise
Moderate
Grooming
Low
Good with Kids
Yes
Good with Pets
No
Loyal Calm Protective Brave

Shiba Inu

Size
17–23 lbs, 14–17 in
Lifespan
13–16 years
Exercise
Moderate
Grooming
Moderate
Good with Kids
No
Good with Pets
No
Alert Bold Faithful Independent

About the Bullmastiff

The Bullmastiff was developed in 19th-century England by crossing Bulldogs with Mastiffs — the goal was a powerful, silent guardian capable of tracking and pinning poachers on large estates without mauling them. Standing 24–27 inches tall and weighing 100–130 pounds, the Bullmastiff is a massive, muscular dog with a broad head, dark muzzle, and an imposing physical presence. Their short, dense coat comes in fawn, red, or brindle — always with a black mask — and sheds moderately with minimal grooming requirements.

Temperament & Personality

Bullmastiffs are confident, loyal, and naturally protective — they are alert guardians who rely on their size and intimidating presence rather than excessive barking to deter intruders. Despite their imposing appearance, they are gentle and affectionate with their families, showing particular patience and tenderness with children. They are typically calm and quiet indoors, content to lie at their owner's feet, but they can be territorial with unfamiliar dogs and require early, consistent socialization.

Pros

  • Naturally protective — their imposing presence alone is an effective deterrent
  • Surprisingly low-energy indoors, adapting well to a calm household routine
  • Gentle and affectionate with family members, including children
  • Minimal grooming needs with their short, easy-care coat

Cons

  • Short lifespan averaging only 7–9 years
  • Prone to bloat, hip and elbow dysplasia, lymphoma, and mast cell tumors
  • Significant drooling, especially around mealtimes and in warm weather
  • Their sheer size and strength require an experienced owner capable of managing 100+ pounds of dog

A Bullmastiff offers protection and companionship in equal measure — explore adoptable Bullmastiffs on Puplister and find your gentle giant.

About the Shiba Inu

The Shiba Inu is Japan's oldest and smallest native breed, originally bred to flush birds and small game in the dense mountain underbrush — "shiba" may refer to brushwood or the breed's red color, while "inu" simply means dog. These compact, agile dogs stand 13.5 to 16.5 inches tall and weigh 17 to 23 pounds, with a fox-like face, small triangular ears, and a curled tail. Their stiff, plush double coat comes in red, sesame, black and tan, or cream, with distinctive "urajiro" (cream to white ventral markings).

Temperament & Personality

Shiba Inus are bold, alert, and fiercely independent — often described as more cat-like than dog-like in their self-possession and fastidious grooming habits. They are loyal to their families but on their own terms, and their strong-willed nature means they do not blindly follow commands. Shibas are known for the infamous "Shiba scream" — a loud, distinctive vocalization produced when displeased or overjoyed — and they can be aloof with strangers and sometimes aggressive toward other dogs.

Pros

  • Naturally clean and almost cat-like — easy to housetrain and self-grooming
  • Compact, manageable size for apartments with adequate exercise
  • Loyal and devoted to their family once trust is established
  • Healthy breed with a long lifespan of 13 to 16 years

Cons

  • Extremely independent and stubborn — not recommended for first-time owners
  • Strong prey drive and unreliable recall make off-leash freedom risky
  • Can be possessive of food, toys, and territory (resource guarding)
  • Prone to allergies, patellar luxation, and hip dysplasia

The Shiba Inu's spirited independence and striking looks have won fans worldwide — discover Shibas on Puplister.

Available for Adoption

31

Bullmastiffs

Browse

29

Shiba Inus

Browse

Related Articles

All Articles →

Frequently Asked Questions

What is the difference between a Bullmastiff and a Shiba Inu?
The Bullmastiff is 100–130 lbs, 24–27 in sized while the Shiba Inu is 17–23 lbs, 14–17 in sized. They differ in size (100–130 lbs, 24–27 in vs 17–23 lbs, 14–17 in), lifespan (7–9 years vs 13–16 years), and care requirements.
Which breed is better with kids, Bullmastiff or Shiba Inu?
Bullmastiff is generally good with kids. Shiba Inu is not typically good with kids.
Which breed lives longer, Bullmastiff or Shiba Inu?
The Bullmastiff has a lifespan of 7–9 years while the Shiba Inu has a lifespan of 13–16 years.

Find Your Perfect Pet

Browse thousands of adoptable pets from shelters near you.

Browse Dogs