Brachycephalic syndrom
What is a brachycephalic dog or cat?
In very simple terms, brachycephalic simply means “flat-faced” or “smushed-nosed“. The term comes from Greek and means “short head“. These animals have a normal-sized lower jaw, but a compressed upper jaw. This aesthetic appearance, resulting from selective breeding, compromises their health in several ways.
Most common breeds:
• Dogs: Pug, Boston Terrier, Pekingese, Boxer, Bulldog (English and French), and Shih Tzu.
• Cats: Persian, Exotic Shorthair, Himalayan, and British Shorthair.
The Respiratory System (Obstructive Syndrome)
These animals tend to snore, breathe noisily, and get out of breath quickly. (Important note: a cat breathing with an open mouth or panting is in severe distress). Their system presents several anatomical deformities:
- Stenotic nares: Abnormally narrowed, slit-like nasal openings, forcing mouth breathing. Corrective surgery is possible from 5 months of age.
- Enlarged tongue (Macroglossia): Particularly common in Bulldogs, a very thick tongue blocks the airways.
- Elongated soft palate: The tissue hangs down into the throat due to a lack of space and causes snorting. Can be surgically corrected.
- Tracheal stenosis: Dangerous narrowing of the windpipe (very common in the English Bulldog), requiring X-rays before any anesthesia.
- Everted laryngeal saccules: Pouches in the larynx that turn inside out under respiratory effort (very common in the Pug).
[!] Beware of heat and exercise: Panting is ineffective for cooling their bodies. Respiratory effort causes inflammation and overheating, making these breeds the primary victims of fatal heatstroke. Without early correction, laryngeal collapse may require a permanent tracheostomy.
The Digestive System
The extreme efforts to inhale air create pressure that causes a reflux of stomach contents into the esophagus. Food stagnates, leading to nausea, vomiting, and pain (especially in the English Bulldog). Surgical correction of breathing often resolves these digestive issues!
Teeth, Skin, and Reproduction
- Crowded teeth: They have as many teeth as other animals but in a jaw that is too small. High risk of tartar and early tooth loss.
- Skin fold infections: Moisture accumulates in facial folds requiring regular cleaning.
- Difficult births: Wide puppy heads frequently require emergency C-sections.
- Complex grooming: Deformed jaws prevent some cats (like Persians) from proper self-grooming.
Eye Problems
Because their eye sockets are very shallow, their eyes are prominent, highly fragile, and vulnerable:
- Watery eyes: Tear ducts deformed or blocked (very common in Persians). High risk of corneal ulcers.
- Lagophthalmos: Inability to close the eyelids completely, drying out the eye.
- Nasal fold irritation: The skin fold rubs against the eye and requires strict maintenance.
- Entropion: The eyelid rolls inward, and eyelashes rub against the eye. Consult our surgical services ➡
- Dry eye: Insufficient tear production leading to thick discharge.
- Proptosis: A minor impact or pulling on the collar can cause the eye to pop out of its socket. Learn about emergency enucleation ➡
Essential Daily Advice & Travel
✔ Ideal weight: Being overweight drastically worsens breathing difficulties.
✔ Harness mandatory: NEVER use a collar, to avoid crushing the throat or causing the eyes to pop out.
✔ Protection against heat and stress.
Why does the AVMA advise against air travel?
The American Veterinary Medical Association warns against traveling in the cargo hold. In stressful or hot situations, the effort to inhale air causes the throat to swell, leading to asphyxiation and very often fatal heatstroke in the hold. Most airlines now prohibit transporting them in the cargo hold.
“Key takeaway: A brachycephalic animal lives the equivalent of constantly breathing through a crushed straw. Early surgical intervention (widening the nostrils) dramatically improves their quality of life.”
Evaluate your pet’s breathing with our team.
Pinched nostrils, loud snoring, or exercise intolerance? Book an appointment for a respiratory exam.
