Pyrenean Mastiff
庇里牛斯獒犬
Updated 2026-09-09
At a glance
The Pyrenean Mastiff (Mastín del Pirineo) is a giant, white-and-patched livestock guardian from the Aragonese Pyrenees, bred for centuries to see off wolves, bears and thieves — the FCI standard sets no upper height limit and says the bigger dog is always preferred. It is friendly to people, calm, noble and very intelligent, courageous towards strangers without backing away, and good-natured with other dogs while well aware of its own strength; it has a very low prey drive, loves children, drools like any mastiff and barks to warn, especially at night. The parent club requires OFA hips, elbows, heart and a degenerative-myelopathy DNA test for breeding stock, and lists Addison's disease, epilepsy, osteosarcoma and bloat among the conditions to know about.
Facts
| Size | Giant |
|---|---|
| Height | 71–79cm |
| Weight | 54–86kg |
| Life expectancy | 10–12years |
| Breed group | AKC: miscellaneous FCI: 2 |
| Role | Guardian |
| Coat | Double coat |
| Shedding | 4/ 5 |
| Exercise | 30–60min/day |
| Can be left alone | up to 4 hours |
| Companionship need | 3/ 5 |
| Trainability | 2/ 5 |
| Barking | 4/ 5 |
| Good with children | 4/ 5 |
| Good with other dogs | 4/ 5 |
| Heat tolerance | 1/ 5 |
| Cold tolerance | 5/ 5 |
Health
This page is general information compiled from published sources. It is not veterinary, legal or purchase advice. Dogs vary within a breed — talk to a vet or a reputable breeder about the dog in front of you.
Health notes are not veterinary advice. Conditions listed are those reported for the breed, not a diagnosis of any dog. Always consult a veterinarian.
Hip dysplasia
An OFA hip radiograph at two years or older is one of the parent club's required screenings, and the AKC says responsible breeders screen for hip and elbow dysplasia. Ask your breeder for both parents' results, and your vet about keeping a giant puppy lean and its exercise age-appropriate.
Elbow dysplasia
Commonly reported in the breed; breeders screen elbows by X-ray. Ask your vet if you notice front-leg lameness, especially in a growing dog.
Heart conditions
A heart auscultation at two years or older is one of the parent club's required screenings; the club and the AKC both note that giant breeds can be prone to heart disease as they age. Ask your vet about heart checks at routine visits.
Bloat (gastric dilatation-volvulus)
The AKC and the parent club both warn that, as a deep-chested giant breed, the Pyrenean Mastiff is at risk of bloat (GDV), a life-threatening emergency. Ask your vet about the warning signs and prevention options.
Ear infections
Because of the drop ears, the AKC says it is essential to check the ears routinely for potential infection; with the double coat, make sure the undercoat dries fully in humid weather to avoid hot spots. Ask your vet how to check and clean the ears.
Degenerative myelopathy
A DNA test for degenerative myelopathy, with results submitted to OFA, is one of the parent club's required screenings; the club describes it as a spinal-cord condition of middle-aged to older dogs. Ask your breeder about DM status and your vet if an older dog shows hind-leg weakness.
Epilepsy
The parent club lists epilepsy among other conditions that may affect the breed. Ask your vet promptly if your dog has a seizure.
Addison's disease
The parent club lists Addison's disease and other autoimmune conditions among conditions that may affect the breed. Ask your vet if your dog has recurring vague illness, vomiting or lethargy.
Cancer
The parent club lists cancers such as osteosarcoma among conditions that may affect the breed. Ask your vet about regular check-ups and about any new lumps or unexplained lameness.
Cherry eye / eyelid problems
The parent club's health page lists entropion, ectropion, extra eyelashes (distichiasis) and persistent pupillary membrane among eye conditions seen in the breed, and recommends an OFA eye examination after one year of age. Ask your vet if the eyes look red, sore or weepy.
Behaviour
Friendly, calm, noble — and never backs away
The FCI standard describes the Pyrenean Mastiff as friendly towards humans, calm, noble and very intelligent, at the same time courageous and proud towards strangers from whom it never backs away; towards other dogs it is good-natured and aware of its superior strength, though it will occasionally fight with great skill — a legacy of centuries of fighting wolves. The AKC adds that it has a very low prey drive, loves children, welcomes friends and family, only feels the need to protect when there is a real threat, barks to alert (guarding is its first instinct) and, like any mastiff, drools.
Conserves energy; protect the growth plates
The AKC describes a breed that conserves energy until it is needed — most are content on the couch or a cool tile floor, though many enjoy hikes and leisurely walks. Scheduled exercise must be limited for a growing giant because extended exercise can damage open growth plates; keep walks age-appropriate, condition the dog before long hikes and prefer unpaved surfaces. Like other livestock guardians it is an independent thinker that must be motivated to work, so start positive-reinforcement training young. The coat is brushed weekly and blows twice a year, and in humid climates the dog must be dried to the skin to avoid hot spots.
Energy and exercise
Energy level is rated 2/5 (fairly low) on the AKC breed-trait chart. The Royal Kennel Club puts its exercise need at "up to 1 hour per day".
Training and barking
AKC trait chart: trainability 2/5, barking level 4/5. Individual dogs vary; early socialisation and reward-based training are recommended for every breed.
Official guidance
Summaries of official documents are ours; the source is linked. Breed standards, laws and licensing rules change — check the issuing body for the current version.
American Kennel Club — Pyrenean Mastiff
Breed overview, breed-trait chart, history, official standard summary and health notes from the AKC and the national parent club.
Read the sourceAccessed 2026-09-09
The Royal Kennel Club — Pyrenean Mastiff Imp
Breed characteristics (size large, exercise up to 1 hour per day, lifespan under 10 years).
Read the sourceAccessed 2026-09-09
FCI nomenclature — Pyrenean Mastiff (standard no. 92, group 2)
FCI breed nomenclature entry with the official breed standard PDF in English, French, German and Spanish.
Read the sourceAccessed 2026-09-09
What owners say
Owner advice is quoted from public community posts and reflects those owners' opinions, not PocketPaw's position. It is unverified and not a substitute for professional advice. Each item links to where it was said.
“Owners writing on the parent club's "What We Love" page describe gentle giants who can turn fierce quickly if they judge something a threat, but who guard in a low-key way — positioning themselves between their people and a stranger rather than growling — and who are extremely in tune with their owner's mood. Expect an independent, "wicked smart" thinker; once you have earned its devotion it is by your side no matter what, and one owner of a smallish build found even a full-grown male surprisingly easy to manage.”
— Pyrenean Mastiff Association of America — What We Love via breed clubWorldwide2026-09-09
Sources
- [1]Pyrenean Mastiff — Dog Breed Information — American Kennel Club (Accessed 2026-09-09)
- [2]Pyrenean Mastiff Imp — Breeds A to Z — The Royal Kennel Club (Accessed 2026-09-09)
- [3]Pyrenean Mastiff — FCI standard no. 92 — Fédération Cynologique Internationale (Accessed 2026-09-09)
- [4]How do I help my dog adjust to spending time alone? — The Royal Kennel Club (Accessed 2026-09-09)
- [5]Incidence and risk factors for heat-related illness (heatstroke) in UK dogs under primary veterinary care in 2016 (Hall, Carter & O'Neill, Scientific Reports 10:9128) — Nature / Scientific Reports (Accessed 2026-09-09)
- [6]FCI-Standard No. 92 — Pyrenean Mastiff (Mastín del Pirineo), 30.08.2002 — Fédération Cynologique Internationale (Accessed 2026-09-09)
- [7]Health Testing — Pyrenean Mastiff Association of America — Pyrenean Mastiff Association of America (Accessed 2026-09-09)
- [8]Health Conditions — Pyrenean Mastiff Association of America — Pyrenean Mastiff Association of America (Accessed 2026-09-09)
- [9]What We Love — Pyrenean Mastiff Association of America — Pyrenean Mastiff Association of America (Accessed 2026-09-09)
- [10]Pyrenean Mastiff Association of America — Parent Club Health Statement (2024) — Pyrenean Mastiff Association of America (Accessed 2026-09-09)
Still have questions?
Ask owners on the PawMunity forum — every breed has its own board.
Breed data compiled by PocketPaw from the sources credited on each entry. Text and layout © 2026 NextPath Solutions Limited. Please link to a page rather than copying it.