Group guide

Mastiff Dogs

Browse mastiff breeds and compare personality, trainability, exercise, and care needs in one place.

Browse 3 breed profiles and use filters to move from broad discovery to a tighter shortlist.

Built from reputable breed standards, veterinary guidance, and breed-specific references. Individual dogs still vary.

Family-friendly Apartment-friendly Low-shedding

3 breeds • Showing 3

Group: Mastiff

3 photos

Cao de Castro Laboreiro

MastiffRarePortugal

BraveIndependent

The Cao de Castro Laboreiro, or Portuguese Cattle Dog, is a loyal and protective breed known for its strong guarding instincts and rich history in Portugal.

Lighter cleanupHigh-motion routinePatient training plan

Cao de Gado Transmontano

MastiffRarePortugal

BraveIndependent

The Cao de Gado Transmontano is a rare Portuguese breed known for its loyalty and protective instincts. Originally bred as a livestock guardian, this medium-sized dog thrives on exercise and training, making it an excellent companion for active families.

High-motion routinePatient training plan

Rafeiro do Alentejo

MastiffUncommonPortugal

CalmIndependent

The Rafeiro do Alentejo, or Alentejo Mastiff, is a large, protective breed from Portugal known for its calm demeanor and strong guarding instincts. Ideal for experienced owners, this loyal companion thrives in spacious environments.

Child-friendly fitHigh-motion routine

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What to compare within mastiff breeds

Breeds in the same group can still feel very different in daily life. Use the filters and detail pages to compare energy, family fit, coat upkeep, and how much structure each breed usually needs.

Family-friendly Apartment-friendly Easy to train Active & playful