
25/04/2025
Have you heard of BOAS (Brachycephalic Obstructive Airway Syndrome)?
BOAS is a term used to describe the anatomical abnormalities seen in flat-faced breeds like Pugs, French Bulldogs and Shih Tzus that affect breathing. This is a progressive, lifelong condition that can interfere with a dog’s ability to exercise, eat, sleep and regulate temperature.
Brachycephalic dogs often have extremely narrow nostrils and elongated, thick soft palates that can obstruct airflow. In more severe cases, the larynx may collapse, worsening respiratory effort. These dogs need to generate much higher pressures in the chest just to breathe, which can lead to secondary issues such as gastro-oesophageal reflux or hiatal hernia.
Clinical signs may range from snoring and noisy breathing to difficulty sleeping, adopting strange sleeping positions, and—at its most severe—collapse. Heat and stress can significantly worsen symptoms, and many affected dogs struggle to cool themselves down, so keeping them cool and calm is vital. A wet towel can help on hot days.
Excess weight can exacerbate the condition. In some cases, weight loss alone improves clinical signs significantly. We’re always happy to support clients with safe and effective weight loss plans.
Diagnosis includes a Functional Grading System, assessing dogs before and after a short exercise test. Grades II and III indicate clinical BOAS, often requiring management or surgery. Alongside this, we’ll examine facial structure, nostrils, soft palate, and chest to create a full clinical picture.
Early recognition and appropriate treatment can make a huge difference to quality of life. If you’re concerned about your dog’s breathing, contact our team to learn more.
www.southdownsveterinaryreferrals.co.uk