Laryngeal paralysis affects the voice box muscles in dogs, preventing the larynx from opening and closing properly during breathing and swallowing. This condition involves the folds and cartilage structures of the larynx, which normally seal the airway when dogs eat or drink. When paralysis develops, these protective mechanisms fail.
Dogs with laryngeal paralysis often display distinctive symptoms. Owners notice a change in their dog's bark, which may sound hoarse or raspy. Affected dogs may struggle to breathe, particularly during exercise or in warm weather. Some dogs develop a high-pitched sound called stridor when inhaling. Difficulty swallowing, coughing while eating, or gagging can signal the condition. In severe cases, dogs may collapse from oxygen deprivation.
The condition develops gradually in most dogs, though trauma or nerve damage can cause sudden onset. Older and large breed dogs face higher risk, with Labrador Retrievers showing particular susceptibility. Some cases link to hypothyroidism or other metabolic issues.
A veterinarian diagnoses laryngeal paralysis through physical examination and laryngoscopy, which allows direct visualization of the larynx while the dog is under anesthesia. X-rays or CT scans may rule out other causes.
Treatment depends on severity. Mild cases benefit from environmental management: keeping dogs cool, reducing exercise, and using harnesses instead of collars to reduce throat pressure. Anti-inflammatory medications sometimes help initially.
Surgical intervention becomes necessary for moderate to severe paralysis. The most common procedure, arytenoid lateralization, pulls the affected laryngeal fold aside to widen the airway. This allows easier breathing but requires careful post-operative management since the dog loses some swallowing protection.
Pet owners should contact their veterinarian immediately if their dog exhibits sudden breathing difficulties, severe stridor,