Which characteristic inherited from the Pug causes audible breathing noises in the Ori Pei?

Answer

Short muzzle (Brachycephalic)

As a brachycephalic (short-nosed) breed, they may grunt or make audible breathing noises, inheriting this trait from the Pug side.

Which characteristic inherited from the Pug causes audible breathing noises in the Ori Pei?
animalDogbreed