Laryngeal Paralysis

Signs of laryngeal paralysis develop gradually and worsen with heat, exercise, or excitement. Many owners initially attribute the changes to normal aging:

• A loud, raspy, or harsh sound with each breath in — sometimes described as breathing through a straw
• A change in bark quality — hoarser or raspier than before
• Exercise intolerance — tiring quickly, stopping to rest, or refusing walks that the dog previously enjoyed
• Gagging, coughing, or retching — especially when drinking water
• Aspiration coughing — a persistent cough that indicates food or fluid entering the airway rather than the esophagus
• Panting that is louder and more effortful than normal
• In severe episodes: blue or grayish gum color (cyanosis), open-mouth distress breathing, collapse — a respiratory emergency requiring immediate emergency care

Heat and humidity dramatically worsen signs, and a warm afternoon walk can trigger a crisis in an affected dog that seemed manageable in cool weather.

Most cases of laryngeal paralysis in dogs are classified as idiopathic (no identifiable underlying cause) and occur in older, large-breed dogs — often as part of a broader condition called geriatric-onset laryngeal paralysis polyneuropathy (GOLPP), in which the nerve degeneration is slowly progressive and eventually affects the hind limbs and esophagus as well:

• Idiopathic / GOLPP — by far the most common form in dogs; disproportionately affects Labrador Retrievers, Golden Retrievers, and Irish Setters, typically between 9 and 13 years of age
• Trauma or iatrogenic injury — damage to the recurrent laryngeal nerve from a wound, bite, or neck surgery (especially thyroid surgery) can cause unilateral or bilateral paralysis
• Hypothyroidism — an underactive thyroid gland is sometimes associated with laryngeal paralysis in dogs; thyroid levels are routinely checked as part of the workup
• Polyneuropathy — other generalized nerve diseases can cause laryngeal dysfunction as one of several findings
• Cats — laryngeal paralysis in cats is uncommon; when it occurs, it is often secondary to a mass, trauma, or a generalized neuromuscular disease

Diagnosis requires direct visualization of laryngeal movement. The evaluation process typically includes:

• Light sedation to examine the larynx — the cartilage flaps (arytenoids) are observed during spontaneous breathing; failure to open symmetrically on inhalation confirms the diagnosis
• Chest and neck radiographs to check for aspiration pneumonia (a common complication), masses, or other contributing conditions
• Complete blood panel with thyroid levels — hypothyroidism is ruled in or out, and overall organ health is assessed before any surgical planning
• Neurological examination — hind-limb reflexes and gait are evaluated for evidence of the broader GOLPP polyneuropathy
• Esophagram or fluoroscopy if esophageal dysfunction (megaesophagus or dysmotility) is suspected

Treatment is tailored to severity and the individual dog's health status:

• Medical management for mild cases or poor surgical candidates — strict activity restriction during warm weather, a cool indoor environment, a slow feeder and elevated food bowl to reduce aspiration risk, sedatives for anxiety-related episodes, and careful weight management. These measures help some dogs with mild signs but are not curative
• Laryngeal tie-back surgery (unilateral arytenoid lateralization) — a suture permanently widens one side of the laryngeal opening, providing a reliably enlarged airway. One side only is tied back (rather than both) to reduce aspiration risk. Most dogs have dramatically improved breathing quality and exercise tolerance within weeks. The trade-off is a modestly increased lifetime risk of aspiration pneumonia, managed by feeding precautions
• Treating underlying conditions — hypothyroid dogs diagnosed with laryngeal paralysis receive thyroid supplementation; in a subset, this improves nerve function enough to improve airway function moderately

Aspiration pneumonia — food or fluid entering the lungs — is the most important complication both before and after surgery. Pneumonia is treated aggressively with antibiotics and supportive care when it develops.

If your older Labrador, Golden Retriever, or large mixed breed has developed a raspy cough, noisy breathing, or is struggling in the summer heat, do not wait for a crisis to seek care. Early evaluation allows time for thorough workup and elective surgical planning — far preferable to emergency intervention during a respiratory episode. A dog that is turning blue, gasping, or collapsed needs emergency care immediately; contact an emergency clinic and follow up with us for surgical consultation. The team at Dog & Cat Hospital Calabasas can diagnose laryngeal paralysis, assess aspiration pneumonia risk, and guide owners through the decision between medical management and laryngeal tie-back surgery. Book an appointment to have your dog evaluated.