Brachiocephalic Obstructive Airway Syndrome (BOAS) is one of the most common causes of upper respiratory tract obstruction in dogs and is less common in cats. The anatomical features of the skull in Brachy- cephalic breeds, cause this syndrome. Due to these features, major abnormalities such as stenotic nares, tracheal hypoplasia, soft palate elongation, everted laryngeal saccules, and laryngeal collapse. This syndrome can lead to variable degrees of obstruction and symptoms such as dyspnea, wheezing, exercise intolerance, and even in severe cases, cyanosis and collapse. As mentioned, nostril stenosis is one of the abnormalities that may develop this syndrome. Axial deviation of the alar cartilage has been reported as the main cause of nasal stenosis in dogs. In cats, the skin fold at the junction of the ventral floor of the nostrils mostly causes nar- rowing of the nares, and deviation of the alar cartilage is less common in this species. During the year 1400, three brachycephalic cats (a four-year-old Per- sian flat-faced, a one-and-a-half-year-old Persian and a two-year-old Chinchilla-Scottish) with symptoms of inspiratory obstruction were referred to the surgery department of Veterinary Teaching Hospital of Ferdowsi University of Mashhad. Common symptoms seen in these patients included respiratory distress, dyspnea, nasal discharge, ster- tor/stridor while examining head and neck, restlessness, and decreased activity. All of these three patients had chronic respiratory problems which was resistant to medication. Based on clinical examinations and evidences, the cause of this obstruction was diagnosed as nostril steno- sis due to the presence of redundant skin in ventral floor of the patients’ nares. After preparation, patients underwent nasal stenotic corrective surgery. During this surgery, the redundant skin in the ventral floor of the both nostrils was resected and the defect was repaired with single pedicle advancement flap technique. In one of the patients, in addition to skin resection, a part of the alar cartilage was removed as needed. Finally, the patients were followed up to three months after surgery, fortunately, postoperative outcomes were positive and none of the owners complained anymore. After the corrective surgery no respiratory distress and signs were seen and the technique seems completely satisfying.

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