National kennel clubs and breed clubs (see, e.g. Breeding/Health Strategy Documents, below)
Population-level statistics (see, e.g., Swedish Insurance Data, below)
Breed club surveys
There are numerous breed standards.
The basis of breed/conformation shows is the judging of pedigree dogs against the 'Breed Standard', which is a picture in words that describes the range of features that are deemed appropriate for the breed.
The German Kennel Club (VDH) | Internationaler Klub für Französische Bulldoggen e.V. (IKFB) FEATURE: Bullies, Pugs and Bulldogs – the current top runners
"The snub-nosed are currently high up on the list of favourite dogs... At the VDH even French Bulldogs & Co have to clear high hurdles for breeding. By means of a stress test, for example, they have to prove that they really are top runners. Journalist Philip Alsen and his camera team paid a visit to the International Club for French Bulldogs (IKFB) to witness a breeding soundness examination." Article/Video Link (English): http://www.vdh.de/en/news/artikel/bullies-pugs-and-bulldogs-the-current-top-runners/
Excerpt: "French Bulldog (Bouledogue francais) - brachycephalic and small molossoïd breed
The special conformation of this breed with shortened skull and overly short bridge of nose as well as underdeveloped tail, cause health problems if exaggerated further.
Areas of risk are:
Breathing: Problems which could result from overly short muzzle as well as pinched nostrils, insufficient room foremost in throat, pharyngeal cavities and/or ribcage.
Face: Too short muzzle and protruding eyes which increase the risk of eye injuries.
Proportions and construction: Overly short proportions in neck and back as well as insufficient angulation in fore and hindquarters can cause powerless dragging movement.
Underdeveloped tail : Lack of visible/touchable tail vertebrae is a disqualifying fault.
Look for sound breathing, correct bridge of nose, eyes, skin, tail and movement. Breed standard reads; "Length of muzzle about 1/6 of the total length of the head".
Gait should be free and active. The breed standard calls for an "active" dog which is "powerful for its small size, short, compact in all its proportions", but the French Bulldog must not be excessively short in neck and back."
9. UK: The Kennel Club: Breed Population Analyses: Recognising the importance of managing the rate of inbreeding, the Kennel Club's Population analysis reports allow breeders to review the unique situation for each breed.
"We are the nerds" Dr. Anne Posthoff, the president of the German International Club for French Bulldogs, explains why the rules for breeding French Bulldogs in Germany are among the strictest in the world.
Received: 16 February 2018 | Accepted: 19 March 2018 | Published: 3 May 2018
Ownership of French Bulldogs in the UK is rising steeply. This means that the disorder profiles reported in this study reflect a current young UK population and are likely to shift as this cohort ages. Otitis externa, diarrhoea and conjunctivitis were the most common disorders in French Bulldogs. Identification of health priorities based on VetCompass™ data can support evidence–based reforms to improve health and welfare within the breed.