Kennel Club's Breed Standard Last Updated October 2009

With the kind permission of the Kennel Club, we are able to present the current Breed Standard.

Mastiff Breed Standard (full standard pdf version)

A Breed Standard is the guideline which describes the ideal characteristics, temperament and appearance of a breed and ensures that the breed is fit for function. Absolute soundness is essential. Breeders and judges should at all times be careful to avoid obvious conditions or exaggerations which would be detrimental in any way to the health, welfare or soundness of this breed. From time to time certain conditions or exaggerations may be considered to have the potential to affect dogs in some breeds adversely, and judges and breeders are requested to refer to the Kennel Club website for details of any such current issues. If a feature or quality is desirable it should only be present in the right measure.

1859 Standard first published by Stonehenge
1883 Standard drawn up by O.E.M.C
1890 A numerical value was given to the points of the mastiff which were printed with the standard until after the Second World War, when the system was abolished for all breeds.
1949 All Standards taken over by The Kennel Club rearranged, and a gait/movement clause was added.
1995 A slight clarification was made.