CONDITION

Laryngeal Paralysis

Why this matters now

Laryngeal paralysis primarily affects older large breed dogs, particularly Labrador Retrievers, Golden Retrievers, and Irish Setters. The condition is increasingly recognised as part of a broader neurodegenerative condition called geriatric onset laryngeal paralysis polyneuropathy (GOLPP). Signs typically develop gradually, often first noticed during warm weather or exercise.

The condition progresses slowly over months to years. Initially, dogs may simply sound different when breathing or panting. Exercise tolerance gradually decreases as airway obstruction worsens. Episodes of severe breathing difficulty can occur during excitement, heat, or exercise. The underlying nerve degeneration affecting the larynx also causes progressive weakness in the hind limbs in many affected dogs.

Signals & patterns

Early signals

Change in bark

The bark may become hoarse, weak, or different in pitch as laryngeal function decreases.

Noisy breathing during exercise

A raspy or stridor-like sound during panting or increased activity is often an early sign.

Mild exercise intolerance

Dogs may tire more easily or need to rest during walks.

Panting more than usual

Increased respiratory effort may manifest as excessive panting, especially in warm conditions.

Later signals

Loud stridor during breathing

A harsh, high-pitched breathing noise becomes audible even at rest.

Episodes of severe breathing difficulty

Excitement, heat, or exercise can trigger episodes of respiratory distress with cyanosis.

Weakness in hind legs

Progressive hind limb weakness often develops as part of the broader neuropathy.

Coughing or gagging when eating

Laryngeal dysfunction affects airway protection during swallowing, risking aspiration.

Click to read about the biological mechanisms

How this is usually investigated

Diagnosis requires visualisation of laryngeal function during light anaesthesia. Assessment also evaluates for the broader neurological condition and rules out other causes.

Laryngeal examination under light sedation

Purpose: To directly observe laryngeal cartilage movement during breathing
Considerations: Performed under light anaesthesia so respiratory effort is maintained. Normal cartilages open during inspiration; paralysed cartilages move minimally or paradoxically.

Neurological examination

Purpose: To assess for concurrent polyneuropathy affecting the limbs
Considerations: Many dogs with laryngeal paralysis have generalised nerve degeneration causing hind limb weakness. Assessment guides prognosis discussions.

Thoracic radiographs

Purpose: To assess the lungs and check for aspiration pneumonia
Considerations: Laryngeal dysfunction increases aspiration risk. Chest X-rays also evaluate heart size and other respiratory conditions.

Blood tests and thyroid function

Purpose: To check for underlying conditions that can cause laryngeal paralysis
Considerations: Hypothyroidism is occasionally associated with laryngeal paralysis, though the relationship is debated.

Electromyography

Purpose: To assess nerve and muscle function more broadly
Considerations: Specialist testing that can demonstrate the extent of polyneuropathy affecting other muscles.

Options & trade-offs

Management depends on severity. Mild cases may be managed conservatively, whilst more severe cases often benefit from surgical intervention.

Lifestyle modification

Avoiding heat, excitement, and strenuous exercise to minimise respiratory demands.

Trade-offs: Appropriate for mild cases. Requires adjustments to daily routine. Air conditioning and avoiding midday walks help in warm weather.

Weight management

Maintaining lean body weight to reduce respiratory effort.

Trade-offs: Reduces oxygen demand and makes breathing easier. Important component of conservative management.

Tie-back surgery (arytenoid lateralisation)

Surgically fixing one laryngeal cartilage in an open position.

Trade-offs: Often significantly improves breathing and quality of life. Increases aspiration risk since the airway is permanently partly open. Most dogs adapt well with careful feeding practices.

Sedation for acute episodes

Calming medications and cooling during respiratory crises.

Trade-offs: Emergency management when breathing difficulty becomes severe. Reduces anxiety and oxygen demand while addressing the crisis.

Physical therapy for hind limb weakness

Exercises and support to maintain mobility as polyneuropathy progresses.

Trade-offs: Addresses the broader neurological condition. Helps maintain muscle mass and function as long as possible.

Common misconceptions

Misconception:

"Laryngeal paralysis only affects breathing"

Reality:

The condition is often part of a broader neurodegenerative disease affecting nerves throughout the body. Hind limb weakness commonly develops alongside or after the laryngeal signs.

Misconception:

"Surgery completely cures the condition"

Reality:

Tie-back surgery significantly improves breathing but creates some ongoing aspiration risk. The underlying neurological degeneration continues to progress.

Misconception:

"Loud breathing in old Labs is normal"

Reality:

Whilst some degree of laryngeal function decline may occur with ageing, progressive noisy breathing and exercise intolerance indicate a significant condition worth assessing.

Noting changes in bark sound, breathing noise, and exercise tolerance provides useful context. Observing whether symptoms worsen in hot weather or during excitement helps identify patterns. Tracking hind limb strength and coordination over time indicates whether broader neurological changes are occurring. Adjusting activity levels and avoiding heat exposure may help manage early cases.

Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS