Flat-faced breeds have become increasingly popular throughout Washington and across North America. French Bulldogs, English Bulldogs, Pugs, Boston Terriers, Persian cats, and Exotic Shorthairs are loved for their distinctive appearance and engaging personalities. Unfortunately, the same features that make these pets so recognizable (and loveable) can also create significant breathing challenges.
At Boundary Bay Veterinary Specialty Hospital in Bellingham, our board-certified surgery team regularly evaluates dogs and cats affected by Brachycephalic Obstructive Airway Syndrome (BOAS). Many owners are surprised to learn that the snoring, snorting, noisy breathing, and exercise intolerance they have come to accept as “normal” for their pet are often signs of chronic airway obstruction.
In reality, many brachycephalic pets spend much of their lives working harder to breathe than they should.
Understanding Brachycephalic Obstructive Airway Syndrome (BOAS)
BOAS is a collection of structural airway abnormalities commonly found in flat-faced breeds. These pets have been selectively bred to have shortened skulls, but the soft tissues within the nose, mouth, and throat often remain proportionally large for the available space. The result is an overcrowded airway that restricts normal airflow.
Common abnormalities associated with BOAS include:
- Narrow nostrils (stenotic nares)
- An elongated or thickened soft palate
- Enlarged tongue tissue
- A narrowed windpipe (hypoplastic trachea)
- Collapse of structures within the larynx (voice box)
- Excess tissue within the nasal passages
BOAS is not simply a cosmetic issue. It is a chronic, progressive respiratory disorder.
Every breath taken against a narrowed airway creates additional stress on the tissues involved in breathing. Over time, the constant effort required to move air through a restricted airway can contribute to chronic inflammation, swelling, and progressive collapse of airway structures, making breathing increasingly difficult.
Why Breathing Problems Often Go Unrecognized
One of the challenges with BOAS is that many affected pets have never known what normal breathing feels like. The signs often develop gradually, and because they are so common in brachycephalic breeds, families frequently assume they are simply part of the breed’s personality or appearance.
Signs that may indicate airway compromise include:
- Loud snoring while awake or asleep
- Snorting, gagging, or reverse sneezing
- Labored breathing
- Difficulty exercising
- Trouble cooling down after activity
- Heat intolerance
- Sleeping with the neck extended
- Restlessness during sleep
- Episodes of weakness, blue gums, or collapse in severe cases
Because these signs often develop slowly, many pets quietly adapt to chronic breathing difficulty over time. Families may not realize how much effort their pet is expending simply to breathe normally.
One of the most common comments surgeons hear after successful airway surgery is: “I didn’t realize how hard my pet was working just to breathe.”
Airway Disease Doesn’t Just Affect the Airway
Although BOAS is primarily considered a respiratory condition, its effects often extend beyond the breathing passages. When pets repeatedly generate strong negative pressure while trying to inhale, that pressure can affect the esophagus and stomach as well.
As a result, some patients develop:
- Regurgitation
- Vomiting
- Excessive drooling
- Lip smacking
- Difficulty swallowing
- Signs of acid reflux
Some brachycephalic pets may also develop a hiatal hernia, a condition in which part of the stomach moves into the chest cavity through the diaphragm.
Food and fluid may move more slowly through the esophagus in some brachycephalic patients, allowing stomach contents to reflux upward more easily. These gastrointestinal abnormalities are one reason brachycephalic patients require careful anesthetic planning. Reflux and regurgitation can increase the risk of aspiration, a potentially serious complication in which stomach contents enter the lungs.
This connection between the airway and digestive tract is one reason a comprehensive evaluation can be so important.
Why Specialists Often Recommend Earlier Intervention
BOAS tends to worsen over time. As pets continue to struggle against airway obstruction, chronic inflammation and tissue changes can progressively narrow the airway even further. Secondary collapse of airway structures may develop, making breathing increasingly difficult. For this reason, surgeons often recommend evaluating affected pets before severe secondary changes occur.
Studies have shown that corrective airway surgery can improve:
- Breathing comfort
- Exercise tolerance
- Sleep quality
- Heat tolerance
- Energy levels
- Overall quality of life
Many owners report that their pets become more active, more comfortable, and better able to participate in normal daily activities after treatment.
Surgical Treatment Is Tailored to the Individual Patient
Not every patient requires the same procedure. Treatment recommendations are based on each pet’s anatomy, clinical signs, and severity of disease.
Widening Narrowed Nostrils
For many pets, one of the most significant sources of airway resistance occurs at the nostrils.
Surgery can enlarge these openings, allowing air to move more freely into the nasal passages.
Soft Palate Surgery
Many brachycephalic pets have a soft palate that is excessively long or thick, partially obstructing airflow through the throat.
Surgery shortens and reshapes this tissue to improve airflow and reduce obstruction.
Removal of Everted Laryngeal Saccules
In some dogs, chronic airway obstruction causes small tissue pockets within the larynx to become pulled into the airway.
Removing these tissues can help improve airflow and reduce obstruction.
Advanced Airway Support
More severely affected patients may occasionally require temporary airway support during recovery.
This can include placement of a temporary tracheostomy tube, which creates an alternate airway through the neck while postoperative swelling resolves.
Why Airway Surgery Requires Specialized Surgical and Anesthetic Care
BOAS patients present unique challenges because their airway abnormalities affect not only how they breathe day-to-day, but also how they respond to sedation, anesthesia, and recovery.
One of the most important things surgeons recognize about BOAS treatment is that the highest-risk period is often not the surgery itself, but the recovery that follows. Airway swelling, obstruction, reflux, and aspiration-related complications can develop rapidly in some patients.
Successful treatment depends on more than the procedure itself. Careful anesthetic planning, advanced monitoring, pain management, and close observation during recovery all play important roles in patient safety.
At Boundary Bay Veterinary Specialty Hospital, airway patients benefit from:
- Board-certified surgical expertise
- Advanced anesthetic monitoring
- Dedicated anesthesia support personnel
- Comprehensive diagnostic imaging
- Collaboration between Surgery, Emergency, Internal Medicine, and Diagnostic Imaging teams when needed
Together with Animal Emergency Care, we provide access to 24-hour emergency care for pets throughout northwest Washington. This collaborative approach helps ensure that patients requiring advanced surgical care have access to emergency support when needed.
Flat-Faced Cats Can Be Affected Too
Although discussions about BOAS often focus on dogs, brachycephalic cats can also experience significant airway obstruction. Persian and Exotic Shorthair cats are most commonly affected. Unlike many dogs with BOAS, brachycephalic cats are often affected primarily by severely narrowed nostrils rather than the broader combination of airway abnormalities commonly seen in canine patients.
Because cats often hide signs of illness more effectively than dogs, breathing difficulties may go unnoticed until they become more significant.
Advances in surgical techniques continue to improve treatment options for affected cats, and many experience meaningful improvement in airflow and breathing comfort after surgery.
When Is It Time to Consider an Airway Evaluation?
If your dog or cat:
- Snores heavily
- Has noisy breathing while awake
- Struggles with exercise
- Overheats easily
- Experiences regurgitation or reflux
- Sleeps with an extended neck position
- Seems unable to rest comfortably
…it may be time to discuss an airway evaluation with your veterinarian.
Earlier intervention often provides the greatest opportunity to improve breathing and quality of life before more severe airway changes develop.
Helping Pets Breathe—and Live—More Comfortably
Flat-faced breeds can be wonderful companions, but they should not have to struggle for every breath. Chronic noisy breathing is often a sign of airway disease, not simply a breed characteristic.
Many owners are amazed by the improvements they see following treatment: quieter breathing, increased stamina, improved sleep, and a pet that appears more comfortable and engaged in everyday life.
If you are concerned about your pet’s breathing, our surgery team is happy to work with your family veterinarian to determine whether further evaluation is appropriate and what options may be available to help your pet breathe more comfortably.
Is snoring normal for flat-faced dogs and cats?
Not necessarily. According to this article, snoring, snorting, noisy breathing, and exercise intolerance are often signs of chronic airway obstruction rather than normal breed characteristics in brachycephalic pets.
What is Brachycephalic Obstructive Airway Syndrome (BOAS)?
BOAS is a collection of structural airway abnormalities commonly found in flat-faced dogs and cats. These abnormalities create an overcrowded airway that restricts normal airflow and can progressively worsen over time.
Which dog and cat breeds are commonly affected by BOAS?
The article identifies French Bulldogs, English Bulldogs, Pugs, Boston Terriers, Persian cats, and Exotic Shorthairs as breeds commonly affected by brachycephalic airway disease.
Why do flat-faced pets have breathing problems?
Flat-faced breeds have shortened skulls, but the soft tissues of the nose, mouth, and throat often remain proportionally large. This creates an overcrowded airway that restricts airflow and makes breathing more difficult.
What are the common signs of BOAS?
Signs may include loud snoring, noisy breathing while awake, snorting, gagging, reverse sneezing, exercise intolerance, heat intolerance, labored breathing, sleeping with the neck extended, restlessness during sleep, and in severe cases, weakness, blue gums, or collapse.
Can BOAS affect more than just a pet’s breathing?
Yes. The article explains that repeated effort to breathe against an obstructed airway can also affect the esophagus and stomach, contributing to regurgitation, vomiting, excessive drooling, difficulty swallowing, acid reflux, and, in some pets, hiatal hernias.
Why does BOAS get worse over time?
Every breath through a narrowed airway creates additional stress on the airway tissues. Over time, this can lead to chronic inflammation, swelling, and progressive collapse of airway structures, making breathing increasingly difficult.
Why do veterinarians often recommend evaluating BOAS early?
The article explains that earlier evaluation may allow treatment before severe secondary airway changes develop, potentially improving breathing comfort, exercise tolerance, sleep quality, heat tolerance, energy levels, and overall quality of life.
Does every pet with BOAS need the same surgery?
No. Surgical treatment is individualized based on each pet’s anatomy, clinical signs, and severity of disease. Procedures may include widening narrowed nostrils, shortening the soft palate, removing everted laryngeal saccules, or providing temporary airway support in more severe cases.
Why is anesthesia more complicated for pets with BOAS?
BOAS affects how pets breathe during sedation, anesthesia, and recovery. The article notes that the recovery period often presents the greatest risk because airway swelling, obstruction, reflux, and aspiration-related complications can develop after surgery.
Can flat-faced cats develop BOAS?
Yes. Persian and Exotic Shorthair cats can also experience significant airway obstruction. According to the article, cats are often affected primarily by severely narrowed nostrils and may hide breathing problems until they become more advanced.
How do I know if my pet should have an airway evaluation?
The article recommends discussing an airway evaluation with your veterinarian if your dog or cat snores heavily, has noisy breathing while awake, struggles with exercise, overheats easily, experiences regurgitation or reflux, sleeps with an extended neck, or seems unable to rest comfortably.
What improvements might owners notice after BOAS treatment?
Many owners report quieter breathing, increased stamina, better exercise tolerance, improved sleep, greater heat tolerance, higher energy levels, and an overall improvement in their pet’s comfort and quality of life.
What specialized care is available for pets with BOAS at Boundary Bay Veterinary Specialty Hospital?
The hospital provides board-certified surgical expertise, advanced anesthetic monitoring, dedicated anesthesia support personnel, comprehensive diagnostic imaging, and collaboration between Surgery, Emergency, Internal Medicine, and Diagnostic Imaging teams, with access to 24-hour emergency care through Animal Emergency Care.
