Stenotic nares

[1] The condition is part of the brachycephalic airway obstructive syndrome common to short-nosed dog[2] and cat breeds.

[3] Dog breeds commonly affected by stenotic nares include Boston Terrier, Boxer, Bulldog, King Charles Spaniel, Lhasa Apso, Pug, and Shih Tzu.

Stenotic nares is a congenital trait, meaning an animal is born with it.

Several resection techniques exist to help correct stenotic nares including alar wing amputation (Trader's technique), punch resection, vertical wedge, horizontal wedge, alapexy, and laser ablation.

[2][5] Since stenotic nares is congenital, there is no prevention other than breeding the trait out over generations.