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Pyrenean Mastiff Complete Breed Guide

Bigger is better!

Last updated: August 2026

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Pyrenean Mastiff breed photo

Quick Facts About Pyrenean Mastiffs

Breed Group
Sporting
Adult Weight
120–240 lbs
Adult Height
25–31 in
Hypoallergenic
No

Characteristics at a Glance

Ratings are on a scale of 1–5, based on breed standards and typical temperament.

Energy Level
Grooming Needs
Trainability

Overview

Pyrenean Mastiffs are giant dogs who love people but are also stubborn. They are very protective of their families and their flock. Pyrenean Mastiffs have lots of energy and are prone to independent thinking, so they're best suited for an experienced owner who knows how to become pack leader.

The Pyrenean Mastiff is a giant dog with a big, loving heart. These dogs have lots of energy, mounds of muscle, and incredible stamina. They were bred to guard livestock from big predators like wolves and bears, so they are extremely protective of the things they love. Pyrenean Mastiffs love people and need lots of love and attention from their human families in return. They are often a little headstrong, so it’s best if you have lots of experience with dogs before adding one of these giant, strong-minded teddy bears to your family.

Characteristics

Lifestyle & Living Conditions

The Pyrenean Mastiff is a big dog with lots of energy. They do best in homes with a yard to play in and don’t take well to apartment life. Pyrenean Mastiffs are excellent with children and readily adopt them into their herd. They get along alright with other pets, especially if they are raised together. The Pyrenean Mastiff can live inside or outside, but they need lots of time spent with their families in order to stay happy.

Exercise & Activity

Pyrenean Mastiffs have plenty of energy stored up in their giant bodies. They need time spent outside in a safe play space, as well as a walk or hike. You’ll be surprised how much bounce in their step this large dog has!

Temperament and Behavior

Pyrenean Mastiffs are protective of their families and because of their size, are capable of fending off large animals from their herd, so strangers should beware this large protector. It’s important to socialize your Pyrenean Mastiff around lots of people from an early age so they do not become too aggressive. Since they are used to making their own decisions when protecting herds, this breed can be headstrong. Owning a Pyrenean Mastiff requires an owner with strong leadership skills.

Coat & Grooming

The Pyrenean Mastiff has a thick, bristly coat that sheds heavily twice a year. You’ll need to brush their coat at least twice a week and even more during shedding periods. They only need a bath when they're truly dirty.

Source: puppies.comVersion: 2026-08-31Updated: August 2026

Pyrenean Mastiff FAQs

Is a Pyrenean Mastiff hypoallergenic?

No. Pyrenean Mastiffs are not considered hypoallergenic, so allergy-sensitive households should spend time with the breed before deciding.

How big does a Pyrenean Mastiff get?

Adult Pyrenean Mastiffs typically fall in this range: weighing 120–240 lbs standing 25–31 in at the shoulder

Breed descriptions and health information are provided for educational purposes only and should not replace consultation with a licensed veterinarian. Individual dogs may vary in temperament and health.

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