Causes of Excessive Snoring in Dogs

Brachycephalic Syndrome and Snoring

Dogs with short muzzles and broad skulls—such as Pugs, Bulldogs, Pekingese, Shih Tzus, Boston Terriers, and Chow Chows—often experience airway obstruction known as brachycephalic syndrome. This condition leads to snoring, snorting, and mouth breathing, especially during exercise or when overheated. Symptoms tend to worsen with age. The syndrome results from multiple structural deformities, including collapsed nostrils, an elongated soft palate, and eversion of the laryngeal saccules. These issues often occur together and are present from birth or develop over time.

Structural Causes of Noisy Breathing

Noisy breathing, including snoring, indicates an obstruction in the nasal passages, throat, or larynx. In brachycephalic breeds, the narrowed airway causes constant airflow resistance, leading to snoring. Collapsed nostrils (stenotic nares) are common in puppies and result from soft, floppy nasal cartilage that collapses during inhalation. This causes varying degrees of airway blockage, leading to noisy breathing, mouth breathing, and in severe cases, a flattened chest and poor growth. An elongated soft palate can also block airflow, contributing to snoring and breathing difficulties.

Other Medical Causes of Snoring-Like Sounds

While snoring is often linked to anatomy, sudden or worsening noisy breathing may signal a medical emergency. A high-pitched, raspy sound called stridor (croupy breathing) occurs when air passes through a narrowed voice box. If this starts suddenly, a foreign body in the voice box is the most likely cause. If it has been present for some time, laryngeal paralysis is a possible diagnosis. This condition affects the ability of the voice box to open properly, leading to breathing difficulties during exertion or heat stress.

When to Seek Veterinary Care

If your dog suddenly develops noisy breathing or snoring—especially if it’s new or worsening—it should be evaluated by a veterinarian. Noisy breathing that appears without prior history may indicate a serious issue like a foreign object, tumor, or laryngeal paralysis. Dogs with chronic snoring due to brachycephalic syndrome may benefit from surgical correction of structural issues like stenotic nares or elongated soft palate. Early diagnosis and treatment can improve quality of life and prevent complications.

Diagnosis and Treatment Overview

Veterinarians diagnose noisy breathing through physical exams and imaging. Chest X-rays and transtracheal washings may be used to assess lung and airway health. For brachycephalic dogs, surgical options such as nostril widening or soft palate shortening can significantly reduce snoring and breathing problems. In cases of laryngeal paralysis or foreign bodies, prompt treatment is essential to prevent respiratory distress. Post-surgical care is critical, especially to avoid swelling that could block the airway.