SYMPTOM
Persistent cough
Owners may observe persistent cough in their pet.
Various conditions
This symptom can occur in multiple conditions and warrants further assessment.
Why timing matters
Early observation
Early recognition allows prompt assessment and intervention if needed.
Later presentation
Persistent or worsening signs may indicate progression requiring attention.
The significance of this symptom depends on its context, duration, and associated findings.
Conditions commonly associated
Angiostrongylus (Lungworm)
Coughing results from larval migration through lung tissue and associated inflammation.
Dilated Cardiomyopathy in Dogs
In dilated cardiomyopathy, the weakened heart muscle can lead to fluid accumulation in or around the lungs, triggering a persistent cough that often worsens at night or during rest. This cough reflects the heart's reduced ability to manage circulatory volume effectively.
Hypertrophic Cardiomyopathy in Cats
Hypertrophic cardiomyopathy in cats can cause persistent cough when thickened heart muscle impairs blood flow and leads to fluid build-up affecting the lungs. The cough may appear alongside breathing changes as the condition progresses.
Feline Asthma
Feline asthma involves chronic airway inflammation that often manifests as persistent coughing, typically with a characteristic hunched posture and extended neck. The cough reflects underlying bronchial constriction and mucus accumulation in the airways.
Pneumonia
Pneumonia causes persistent cough as the lungs respond to inflammation and infection, often producing mucus or fluid that the body attempts to clear. The cough in pneumonia tends to appear alongside other signs of respiratory distress and systemic illness.
Laryngeal Paralysis in Dogs
Laryngeal paralysis can trigger a persistent cough as the incompletely opening larynx irritates the airway and disrupts normal breathing patterns. The cough may accompany characteristic voice changes and increased respiratory effort, particularly during exertion or heat.
When to explore further
When the symptom is persistent or worsening
When other signs are present alongside
When daily activities or quality of life are affected
When there is uncertainty about the cause
Noting when this symptom occurs, any triggers, and how it changes over time can provide useful information for veterinary discussions.
Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS