Shih Tzus snort because of their flat facial structure. Their shortened skull compresses the airway into a smaller space, which means air has to squeeze through narrower passages on every breath. This creates turbulence and vibration in the soft tissues of the nose and throat, producing the snorting sounds that are so characteristic of the breed. While some snorting is simply part of life with a flat-faced dog, the frequency and intensity can tell you a lot about your dog’s comfort and health.
The Flat-Face Factor
Shih Tzus are a brachycephalic breed, meaning they were bred to have a short, wide skull. The problem is that while the skull got shorter over generations of breeding, the soft tissue inside didn’t shrink to match. The result is too much tissue packed into too small a space, and that’s the root cause of most snorting.
Two anatomical features do most of the work. First, nearly all brachycephalic dogs (96 to 100%) have a soft palate that’s too long relative to their head size. This floppy flap of tissue at the back of the throat partially blocks airflow into the windpipe, vibrating with each breath and producing snoring and snorting sounds. Second, about half of dogs with airway obstruction have stenotic nares: nostrils that are abnormally narrow and may collapse inward when the dog inhales. If your Shih Tzu’s nostrils look like thin slits rather than open circles, this is likely contributing to the noise.
Together, these features make up what veterinarians call brachycephalic obstructive airway syndrome. Most brachycephalic dogs are affected to some degree. It’s not a defect that some Shih Tzus have and others don’t. It’s built into the breed’s anatomy, and snorting is the most audible consequence.
Reverse Sneezing: The Dramatic Snort
If your Shih Tzu occasionally has episodes where they stand rigid, extend their neck, and make loud, rapid snorting sounds through their nose, that’s reverse sneezing. It looks alarming the first time you see it, but it’s a reflex triggered by irritation in the back of the nasal passages. Unlike a normal sneeze that pushes air out, a reverse sneeze rapidly pulls air in through the nose while the opening to the windpipe closes. The result is a forceful, honking snort that can repeat in a burst lasting anywhere from a few seconds to a couple of minutes.
During an episode, your dog will typically stand with their neck stretched forward, elbows pointed outward, nostrils flared, and mouth closed. It’s essentially a gag reflex for the nasal passages, helping clear dust, allergens, or other irritants from the upper airway. Shih Tzus are especially prone to reverse sneezing because their elongated soft palate can get briefly caught on the epiglottis (the flap that covers the windpipe during swallowing), triggering the reflex.
Common triggers include excitement, pulling against a leash, eating or drinking too fast, pollen, dust, smoke, strong odors, and even sudden temperature changes. Most episodes resolve on their own. Gently stroking your dog’s throat or briefly covering their nostrils to encourage a swallow can help end an episode faster.
Environmental Triggers That Make It Worse
Some Shih Tzus snort more on certain days or in certain rooms, and that’s usually environmental. Household irritants like perfume, cleaning products, cigarette smoke, scented candles, and air fresheners can all inflame the nasal passages and increase snorting. Seasonal allergens like pollen and mold spores are common culprits too, especially in spring and fall.
Dust and dry air deserve special mention. Dusty environments irritate the already-narrow nasal passages, and low humidity can dry out the mucous membranes that line them. If you notice your Shih Tzu snorts more during winter when the heat is running, a humidifier in the room where they sleep can help. Keeping floors vacuumed and switching to unscented household products are simple changes that often reduce the frequency of snorting episodes.
How Weight Affects Breathing
Extra body weight makes snorting noticeably worse. In brachycephalic dogs, excess fat deposits around the throat and airway further narrow passages that are already tight. Even a pound or two of extra weight on a small dog like a Shih Tzu can meaningfully increase breathing noise, reduce exercise tolerance, and make episodes of respiratory distress more likely. Keeping your Shih Tzu at a lean body weight is one of the most effective things you can do to minimize snorting and protect their long-term airway health.
Everyday Ways to Reduce Snorting
Switching from a collar to a chest harness is a straightforward change that helps. Collars put pressure directly on the throat when a dog pulls, which compresses an airway that’s already compromised. A harness distributes that force across the chest instead, avoiding throat damage and reducing the chance of triggering a snorting or reverse sneezing episode on walks.
Beyond that, managing your dog’s environment and activity level makes a real difference. Avoid exercising your Shih Tzu in hot or humid weather, since heat forces them to breathe harder through airways that can’t keep up with the demand. Keep meals calm and consider a slow-feeder bowl if your dog eats quickly, as gulping food and air is another common snorting trigger. Elevating food and water bowls slightly can also reduce the amount of air swallowed during meals.
When Snorting Signals a Problem
Occasional snorting during play, meals, or naps is expected for the breed. But there are clear signs that breathing difficulty has crossed into something more serious. Watch for a bluish tinge to the gums or tongue, which signals your dog isn’t getting enough oxygen. Rapid open-mouth breathing at rest, visible abdominal effort with each breath (the belly pumping in and out), and weakness or collapse are all signs of respiratory distress that need immediate veterinary attention.
A progressive increase in snorting over weeks or months also warrants a checkup, even without dramatic symptoms. Chronic airway obstruction can cause secondary problems over time. In one study of brachycephalic dogs with airway syndrome, 97% had abnormalities in the esophagus, stomach, or upper intestine, and 74% had moderate to severe gastrointestinal issues. The constant effort of breathing against a partially blocked airway creates negative pressure that affects the digestive system too. If your Shih Tzu has both noisy breathing and frequent vomiting or regurgitation, those problems are likely connected.
Surgical Options for Severe Cases
For Shih Tzus whose snorting is severe enough to limit their activity, disrupt sleep, or cause distress, surgery can widen the airway. The most common procedures trim the elongated soft palate and open up narrow nostrils. In one study of 55 dogs that had soft palate surgery, 97.5% showed improvement in their breathing, with most improving within two weeks. Dogs that have surgery earlier in life, before the chronic strain causes secondary changes deeper in the airway, tend to have the best outcomes.
Surgery doesn’t eliminate snorting entirely. Your Shih Tzu will still have a shorter-than-average airway and will likely always make some noise. But for dogs that struggle to breathe during normal activity, the improvement in quality of life is significant.
Tracheal Collapse: A Different Sound
One condition worth distinguishing from normal Shih Tzu snorting is tracheal collapse, which produces a harsh, dry, honking cough rather than a wet snort. Small breeds are prone to it, and it can sound similar to reverse sneezing at first. The key difference is that tracheal collapse tends to produce a persistent cough that worsens with excitement or pressure on the neck, while reverse sneezing comes in distinct episodes with the characteristic rapid inward snorting and then resolves completely. If your dog’s “snorting” sounds more like a goose honk and doesn’t follow the typical reverse sneezing pattern, that’s worth bringing up with your vet.