What is BOAS?
Brachycephalic Obstructive Airway Syndrome — understanding the condition that affects flat-faced dogs.
Understanding Brachycephalic Obstructive Airway Syndrome
BOAS stands for Brachycephalic Obstructive Airway Syndrome. It is a condition that affects dogs bred to have short, flat faces — known as brachycephalic breeds. Their distinctive appearance comes at a cost: the same selective breeding that shortens the skull also compresses the soft tissues of the nose and throat, often causing significant breathing difficulties.
Common brachycephalic breeds include French Bulldogs, English Bulldogs, Pugs, Shih Tzus, Boxers, Cavalier King Charles Spaniels and Boston Terriers. Not all dogs of these breeds will require surgery, but many experience some degree of airway compromise that affects their quality of life.
Commonly affected breeds
Signs your dog may be affected
Noisy breathing
Snoring, snorting or raspy breathing at rest or during exercise.
Exercise intolerance
Tiring quickly, reluctance to walk or play, long recovery time.
Breathing distress
Open-mouth breathing, laboured chest movement.
Sleep disturbance
Waking frequently, restless sleep, unusual sleeping positions.
Gagging or retching
Particularly after eating or drinking.
Cyanosis
Blue-tinged gums during or after exertion (emergency sign).
Heat sensitivity
Struggling more in warm weather.
Noisy eating or drinking
Gulping, gagging or coughing around food.
Unusual sleeping habits
Sleeping with a ball or toy in the mouth, sleeping upright, or resting the chin on surfaces.
Signs of breathing difficulty can vary widely between dogs. This information is for guidance only and is not a substitute for a veterinary assessment. If you are concerned about your dog's breathing, please speak to your vet in the first instance.
Why does it matter?
Many owners are accustomed to their dog's noisy breathing and assume it is normal for the breed. While it is common, it is not harmless. Dogs with untreated BOAS can suffer from chronic sleep deprivation, exercise intolerance, gastrointestinal reflux and, in severe cases, collapse or respiratory crisis. Quality of life is significantly affected.
BOAS is a progressive condition — it tends to worsen with age and weight gain. Early assessment and, where appropriate, surgical intervention can make a meaningful difference to a dog's comfort and longevity.
Think your dog might have BOAS?
Book a complimentary consultation with Dr Faheem to discuss your dog's symptoms and understand whether a surgical assessment might be appropriate.