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The key is understanding that in order to attain the smoosh-faced look that their fans find aesthetically pleasing, brachycephalic dogs are bred in ways that prioritize style over function.

Passengers with brachycephalic dogs contend with even fewer choices because of a widespread ban on snub-nosed canines, which are prone to breathing issues.

She is one of the country's leading experts in brachycephalic breeds.

Indeed, he warned that if brachycephalic dogs continue to be inbred at current rates, they may not exist in the near future.

"While these extreme, unhealthy characteristics remain, we will continue to strongly recommend potential owners do not buy brachycephalic breeds such as pugs," Justine Shotton, president of the British Veterinary Association added.