Mastiff vs Shih Tzu

Which dog breed is right for you?

Mastiff

Size
120–230 lbs, 28–36 in
Lifespan
6–10 years
Exercise
Low
Grooming
Low
Good with Kids
Yes
Good with Pets
Yes
Gentle Dignified Brave Patient

Shih Tzu

Size
9–16 lbs, 9–11 in
Lifespan
10–18 years
Exercise
Low
Grooming
High
Good with Kids
Yes
Good with Pets
Yes
Affectionate Playful Outgoing Loyal

About the Mastiff

The English Mastiff is one of the most ancient and massive dog breeds, with roots tracing back over 2,000 years to ancient Britain and possibly earlier Molosser-type dogs of Asia. Males commonly weigh 160 to 230 pounds and stand 30 inches or taller at the shoulder, making them among the heaviest domestic dogs in the world. Their short, dense double coat comes in fawn, apricot, or brindle — always with a distinctive dark mask on the face.

Temperament & Personality

Despite their imposing size, Mastiffs are famously gentle, calm, and deeply loyal — often called "gentle giants" with good reason. They are patient and protective with children in their family, though their sheer mass means supervision around small kids is wise. Mastiffs tend to be reserved with strangers but rarely aggressive, preferring to position themselves between their family and any perceived threat.

Pros

  • Naturally protective without needing guard training
  • Surprisingly low energy indoors — content to lounge for hours
  • Gentle and patient temperament ideal for families
  • Short coat requires only basic weekly brushing

Cons

  • Massive food bills — adult Mastiffs eat 6 to 10 cups of food daily
  • Shorter lifespan of 6 to 10 years typical of giant breeds
  • Prone to hip dysplasia, bloat (gastric torsion), and heart conditions
  • Excessive drooling is a constant reality with this breed

Ready to welcome a magnificent gentle giant into your home? Explore Mastiff adoption opportunities on Puplister.

About the Shih Tzu

The Shih Tzu — meaning "lion dog" in Mandarin — was bred for centuries within the walls of the Chinese imperial palace, likely from crosses between the Lhasa Apso and the Pekingese. These small, sturdy dogs stand 9 to 10.5 inches tall and weigh 9 to 16 pounds, with a slightly longer body than they are tall and a proud, flowing gait. Their luxurious double coat grows continuously and can reach floor length, coming in virtually every color and combination, with a distinctive chrysanthemum-like pattern on the face where hair grows in all directions.

Temperament & Personality

Shih Tzus are affectionate, outgoing, and delightfully playful — bred solely as companion dogs, they have centuries of experience perfecting the art of being a devoted lapdog. They are friendly with nearly everyone, including children, strangers, and other pets, making them one of the most sociable toy breeds available. Shih Tzus are happy, adaptable, and surprisingly sturdy for their size, with a mischievous charm that keeps their families entertained.

Pros

  • Exceptionally friendly and sociable with people of all ages and other animals
  • Low exercise requirements — short walks and indoor play satisfy their needs
  • Minimal shedding when coat is kept in a shorter "puppy clip"
  • Adaptable and content in apartments, condos, and any living situation

Cons

  • Long coat demands daily brushing or frequent professional grooming
  • Brachycephalic structure contributes to breathing issues and heat intolerance
  • Prone to eye problems (proptosis, corneal ulcers), ear infections, and dental disease
  • Can be stubborn about housetraining — patience and consistency are essential

A Shih Tzu's sole mission in life is to love and be loved — find yours waiting on Puplister today.

Available for Adoption

42

Mastiffs

Browse

40

Shih Tzus

Browse

Related Articles

All Articles →

Frequently Asked Questions

What is the difference between a Mastiff and a Shih Tzu?
The Mastiff is 120–230 lbs, 28–36 in sized while the Shih Tzu is 9–16 lbs, 9–11 in sized. They differ in size (120–230 lbs, 28–36 in vs 9–16 lbs, 9–11 in), lifespan (6–10 years vs 10–18 years), and care requirements.
Which breed is better with kids, Mastiff or Shih Tzu?
Mastiff is generally good with kids. Shih Tzu is generally good with kids.
Which breed lives longer, Mastiff or Shih Tzu?
The Mastiff has a lifespan of 6–10 years while the Shih Tzu has a lifespan of 10–18 years.

Find Your Perfect Pet

Browse thousands of adoptable pets from shelters near you.

Browse Dogs