Mastiff vs Portuguese Water Dog

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

Portuguese Water Dog

Size
35–60 lbs, 17–23 in
Lifespan
11–13 years
Exercise
High
Grooming
Moderate
Good with Kids
Yes
Good with Pets
Yes
Adventurous Athletic Loyal Obedient

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 Portuguese Water Dog

The Portuguese Water Dog was developed centuries ago along Portugal's coast, where it served as an indispensable fisherman's companion — herding fish into nets, retrieving lost tackle, and swimming messages between boats. These robust, medium-sized dogs stand 17 to 23 inches tall and weigh 35 to 60 pounds, with a strong, muscular build optimized for swimming. Their coat comes in two varieties — curly or wavy — in black, white, brown, or combinations thereof, and grows continuously like human hair rather than shedding seasonally.

Temperament & Personality

Portuguese Water Dogs are spirited, obedient, and deeply bonded to their families — they thrive on being included in activities and do not do well relegated to the backyard. They are playful and patient with children, typically friendly with other dogs, and possess an enthusiasm for life that is both infectious and demanding. Their intelligence and eagerness to work make them highly trainable, though they need a job or purpose to remain content.

Pros

  • Low-shedding, hypoallergenic-type coat suitable for many allergy sufferers
  • Outstanding swimming ability and love of water activities
  • Highly trainable, biddable, and eager to please
  • Robust health with a lifespan of 11 to 13 years

Cons

  • High exercise demands — needs vigorous daily activity including swimming when possible
  • Coat requires regular professional grooming every 4 to 6 weeks
  • Can become mouthy and destructive if under-stimulated or left alone too long
  • Prone to hip dysplasia, progressive retinal atrophy, and GM1 storage disease

A water-loving, people-devoted companion awaits — explore Portuguese Water Dog listings on Puplister.

Available for Adoption

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Frequently Asked Questions

What is the difference between a Mastiff and a Portuguese Water Dog?
The Mastiff is 120–230 lbs, 28–36 in sized while the Portuguese Water Dog is 35–60 lbs, 17–23 in sized. They differ in size (120–230 lbs, 28–36 in vs 35–60 lbs, 17–23 in), lifespan (6–10 years vs 11–13 years), and care requirements.
Which breed is better with kids, Mastiff or Portuguese Water Dog?
Mastiff is generally good with kids. Portuguese Water Dog is generally good with kids.
Which breed lives longer, Mastiff or Portuguese Water Dog?
The Mastiff has a lifespan of 6–10 years while the Portuguese Water Dog has a lifespan of 11–13 years.

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