Pyrenean Mountain Dog

Lifestyle Needs

Pyrenean Mountain Dog

The Pyrenean Mountain Dog is a large, heavy dog, mainly white in colour. He was once used as a guard dog, protecting flocks against wolves. His sheer size requires ample space both indoors and outdoors. He has a thick, double coat which needs regular grooming and which can cause him to over heat in warm weather. He can be gentle and affectionate but does not make an ideal family dog.

Genetic Diversity
(Known as Coefficient of Inbreeding: 'COI'. It should be as low as possible.)

The UK Kennel Club breed average COI is 3.7% - See 'A Beginners Guide to COI'

Gene Pool Size
(Known as Effective Population Size: 'EPS')


EPS is a measure of how many individuals are contributing genetically to a breed population. It is a measure of the size of the gene pool in a breed. Lower than 100 is considered critical by conservationists and below 50 brings a breed close to extinction. For more information see the Kennel Club article.

Health and Welfare Problems due to Conformation
(Body shape and physical characteristics)

  • The Pyrenean’s white coat colour predisposes the breed to deafness
  • His size predisposes him to musculoskeletal problems
  • Medial canthal pocket syndrome due to headshape causes the corner of the eye to be exposed to dirt and dust, causing pain and damage to the eye

BVA/KC Health Schemes:

  • Hip dysplasia: breed 5 year mean score 9.3 (parents should be lower)
  • Elbow dysplasia (score should be as low as possible)
  • Eye disease

Estimated Breeding Values (EBVs) : No EBVs are currently available for this breed

DNA Tests Available
DogWellNet and IPFD Harmonisation of Genetic Testing for Dogs (HGTD)


  • Canine Multi-focal Retinopathy 1 (CMR)
  • Neuronal Degeneration

Availability of a DNA test does not mean that it is always necessary or even desirable for breeders to use this test.

Other Breed-Specific Health Screening Schemes

None known

Ask the breeder to show you the certificates for the above tests/screening for both parents. If any of the above tests have not been considered necessary by the breeder (and there may be good reasons), ask her to explain why.

Other Diseases Reported
(For which there are currently no genetic or screening tests for sire or dam)

  • Deafness
  • Heart disease
  • Panosteitis
  • Patellar luxation
  • Osteochondrosis – shoulder
  • Cancer: osteosarcoma; sweat gland tumor
  • Entropion
  • Laryngeal paralysis-polyneuropathy syndrome

Ask the breeder about the medical history of the parents, grandparents and great grandparents. Consider carefully whether to purchase a puppy if some of these or other diseases are in the family line.

Ask about the breeder’s policy in cases of serious genetic diseases occurring to your puppy in later life. Good breeders will request to be informed of such events in order to improve future breeding decisions.

You are strongly advised to buy from a breeder who uses (or is prepared to use) the AWF Puppy Contract and Puppy Information Pack (PIP):

The breeder should also be familiar with the CFSG/DBRG Code of Practice for Dog Breeding

Or the Kennel Club’s Assured Breeders Scheme Standard and Guidance:
Standard PDF | Guidance PDF

Breed Health Information