What every owner needs to know
Brachycephalic Obstructive Airway Syndrome, commonly known as BOAS, is the most significant health concern facing flat-faced breeds. Understanding this condition is essential for anyone who owns – or is considering owning – a Pug, French Bulldog, English Bulldog, or similar breed.
What is BOAS?
BOAS is a collection of anatomical abnormalities that restrict airflow in brachycephalic dogs. The shortened skull hasn’t proportionally reduced the amount of soft tissue in the airways, creating a mismatch between the space available and the structures that must fit within it.
Think of it as trying to fit the same amount of furniture into a room that’s been made smaller – something has to give, and in this case, it’s the dog’s ability to breathe comfortably.
The four main components
Stenotic nares: Narrowed nostrils that restrict air intake. You can often see this simply by looking at your dog’s nose – the openings may appear slit-like rather than open.
Elongated soft palate: The soft tissue at the back of the throat is too long for the shortened skull, partially blocking the airway. This creates the characteristic snoring sound many owners find endearing, but it actually indicates obstruction.
Hypoplastic trachea: A narrowed windpipe that further restricts airflow. Not all brachycephalic dogs have this, but it’s more common in severely affected individuals.
Everted laryngeal saccules: Small sacs near the vocal cords that get pulled into the airway due to the increased effort required to breathe. This is often a secondary change that develops over time.
Recognising the signs
Many owners dismiss BOAS symptoms as ‘normal for the breed,’ but these signs indicate genuine respiratory distress:
– Noisy breathing, snoring, or snorting, even when awake and calm
– Difficulty breathing during or after exercise
– Blue or purple gums (a veterinary emergency)
– Reduced exercise tolerance or reluctance to play
– Gagging, retching, or bringing up white foam
– Collapsing or fainting after excitement or exertion
– Difficulty eating or drinking
– Sleeping with toys in their mouth (to help keep airways open)
– Preferring to sleep with their head elevated
The South African climate challenge
South Africa’s climate presents particular challenges for brachycephalic breeds. Our hot, humid summers – especially along the coast – can be dangerous for dogs already struggling to breathe efficiently.
Dogs cool themselves primarily through panting, which requires efficient air movement. Brachycephalic dogs cannot pant effectively, putting them at severe risk of heatstroke even in moderate temperatures that wouldn’t trouble other breeds.
On the Highveld, the combination of heat and high altitude can compound breathing difficulties, whilst coastal humidity makes every breath more laboured.
When to seek vet care
Contact your veterinarian if you notice:
– Any sudden worsening of breathing sounds
– Reluctance to exercise that’s developed recently
– Episodes of severe distress, especially in hot weather
– Blue-tinged gums or tongue
– Collapse or loss of consciousness
These are not ‘just part of owning a Frenchie’ – they’re signs a dog needs help.
Can BOAS be treated?
The good news is that surgical intervention can significantly improve the quality of life for many affected dogs. Procedures to widen nostrils, shorten the soft palate, or remove everted saccules can reduce airway obstruction.
However, prevention through responsible breeding remains the best approach. Breeders who select for more moderate features – slightly longer muzzles, more open nostrils – can produce healthier dogs whilst maintaining breed characteristics.
Living with a BOAS-affected dog
If your dog has BOAS, management focuses on minimising stress on the respiratory system:
– Avoid exercise during hot weather
– Use a harness rather than a collar to prevent pressure on the throat
– Maintain a healthy weight – every extra kilogram makes breathing harder
– Provide air-conditioned spaces during summer
– Never leave your dog in a car, even briefly
– Consider surgical options in consultation with your veterinarian
BOAS is a serious condition, but understanding it empowers you to provide the best possible care for your flat-faced companion.
Next, we’ll explore practical summer safety strategies specifically for brachycephalic breeds in South African conditions.
