Strange nasal breathing in dogs usually comes down to a handful of causes, ranging from a harmless episode of reverse sneezing to something that needs veterinary attention like a foreign object or infection. The sound itself offers clues: a sudden snorting fit that lasts a few seconds points to different causes than weeks of noisy, congested breathing. A normal resting dog takes 15 to 30 breaths per minute, so if your dog’s breathing rate consistently exceeds 30 while resting or sleeping, something is off.
Reverse Sneezing: The Most Common Culprit
If your dog suddenly starts making rapid, loud snorting sounds through the nose while standing still with a stiff neck, you’re likely witnessing reverse sneezing. Unlike a regular sneeze that pushes air out, a reverse sneeze pulls air forcefully inward while the opening to the windpipe closes. It looks alarming, but each episode typically resolves on its own within 30 seconds or so.
Reverse sneezing is the body’s way of clearing irritants from the upper airway. Common triggers include dust, pollen, excitement, eating or drinking too fast, and pulling hard against a leash. Some dogs do it once in a while and never need treatment. If episodes become frequent (multiple times a day or lasting longer than usual), that pattern can signal an underlying issue like nasal mites, an infection, or gastrointestinal problems causing irritation in the throat.
Flat-Faced Breeds and Chronic Noisy Breathing
Bulldogs, pugs, French bulldogs, Boston terriers, and other short-nosed breeds are genetically predisposed to a condition called brachycephalic obstructive airway syndrome. Their compressed skull shape creates several airway problems at once. One of the most visible is stenotic nares: abnormally narrow nostrils that may collapse inward each time the dog inhales. You can often spot this just by looking at your dog’s nostrils and noticing whether they pinch shut during a breath.
These dogs tend to snore, snort, and breathe loudly through the nose even at rest. Heat and exercise make it worse because the dog needs more airflow through passages that are already too small. If your flat-faced dog has always been a noisy breather, that’s the breed’s anatomy at work. But if the noise has gotten worse over time, or if your dog seems to struggle more during mild activity, a vet can evaluate whether surgical correction of the nostrils or soft palate would help.
Something Stuck in the Nose
A dog that was fine an hour ago and is now pawing at its face, sneezing violently, or breathing loudly through one nostril may have inhaled a foreign object. Grass seeds and plant material are the most common offenders, especially in dogs that spend time sniffing through tall grass or underbrush. The sneezing is usually sudden and intense at first, then may taper off as the object settles deeper into the nasal passage.
Once the initial sneezing calms down, you might notice thick, yellow or green discharge from one nostril. That one-sided pattern is a strong signal. The discharge starts because the trapped material triggers inflammation and secondary bacterial infection. A vet can often locate and remove the object using a small scope inserted into the nostril, sometimes with nothing more than an otoscope.
What Nasal Discharge Color Tells You
Pay attention to what’s coming out of your dog’s nose alongside the weird breathing. The color and consistency narrow down the cause significantly.
- Clear and watery: Usually early-stage inflammation or a mild viral irritation. On its own, this is the least concerning type.
- White or yellow and thick: Chronic inflammation. Something has been irritating the nasal lining for a while.
- Yellow-green: Bacterial infection, almost always secondary to another problem like a foreign body, fungal infection, or dental disease.
- Blood-tinged or bloody: The lining has been damaged enough to involve blood vessels. This can accompany fungal infections, tumors, trauma, or even a clotting disorder. Nosebleeds that recur or come from one side warrant a vet visit soon.
Discharge from both nostrils suggests a systemic issue (infection, allergies), while one-sided discharge points toward something localized like a foreign body, a fungal infection, or a nasal mass.
Infections That Affect Nasal Breathing
Kennel cough is one of the most recognizable respiratory infections in dogs. Its hallmark is a loud, high-pitched honking cough, but sneezing, nasal discharge, and noisy breathing through the nose often come along with it. Dogs typically pick it up in social settings: boarding facilities, dog parks, grooming salons. Most cases resolve within a couple of weeks, though puppies and older dogs can develop pneumonia with labored breathing.
Fungal infections, particularly aspergillosis, are a less common but more serious cause of nasal symptoms. These tend to produce bloody or thick discharge, usually from one side, along with visible discomfort. A vet diagnoses fungal rhinitis by looking for characteristic fungal plaques inside the nasal cavity with a small camera and confirming with a culture.
Nasal Mites
Nasal mites are tiny parasites that live inside a dog’s nasal passages and sinuses. They spread through direct or indirect contact between dogs. The symptoms overlap with many other nasal problems: sneezing, discharge, nosebleeds, noisy breathing, head shaking, and rubbing the face. Because these signs are so nonspecific, nasal mites are easy to miss. A definitive diagnosis requires a vet to either visualize the mites with a nasal scope or flush them out with a saline rinse. Treatment is straightforward once the mites are identified.
Nasal Tumors
Nasal tumors are uncommon overall but worth knowing about, especially in older dogs. The classic pattern is chronic, one-sided nasal discharge that’s yellow, green, or blood-tinged and doesn’t respond to antibiotics. Over time, you might notice the bridge of the nose looking swollen or asymmetric, or one eye starting to bulge. Nosebleeds from one nostril are another warning sign. When imaging (like a CT scan) doesn’t clearly distinguish a tumor from a fungal infection or foreign body, a vet will use a nasal scope to take a biopsy for confirmation.
Signs That Need Immediate Attention
Most causes of weird nasal breathing aren’t emergencies, but respiratory distress is. Know these warning signs:
- Blue or purple gums and muzzle: This means your dog isn’t getting enough oxygen.
- Belly pumping with each breath: The abdominal muscles are contracting visibly to force air in and out.
- Neck stretched forward, mouth open: Your dog is trying to physically open the airway as wide as possible.
- Weakness or collapse: Combined with any breathing difficulty, this is critical.
- Wheezing, whistling, or loud breathing sounds that don’t stop: Persistent abnormal sounds signal significant airway obstruction.
Any combination of these signs means a trip to the nearest emergency animal hospital, not a wait-and-see approach. Respiratory distress can deteriorate quickly, and dogs compensate well until they can’t.
Checking Your Dog’s Breathing at Home
A simple way to gauge whether something is genuinely wrong: count your dog’s breaths while they’re resting calmly or sleeping. Watch the chest rise and fall for 30 seconds, then double the number. A result under 30 breaths per minute is normal. If you consistently get numbers above 30 at rest, that’s worth bringing up with your vet, even if the breathing doesn’t sound dramatic. Keeping a log over a few days gives your vet useful data to work with and helps distinguish a temporary irritant from a developing problem.