Don’t Ignore the Cough: How Early Recognition of Equine Asthma Can Protect Horse Health

Equine asthma is one of the most common respiratory conditions affecting horses, yet it is often overlooked in its early stages. In Episode 71 of the Scoop & Scale Podcast, Laurent L. Couëtil, DVM, PhD, DACVIM, explains how subtle respiratory signs can point to a larger problem and why early diagnosis and management are so important for both horse health and performance.

The Problem with Missed Symptoms

Many horse owners do not realize that mild signs such as occasional coughing, nasal discharge, or reduced performance may be linked to airway inflammation. According to Dr. Couëtil, coughing during exercise is not normal and should not be dismissed. Even mild respiratory issues can affect airflow, limit oxygen intake, and reduce a horse’s ability to perform comfortably and consistently.

What Causes Equine Asthma?

Equine asthma is often triggered by environmental irritants. Dust, mold spores, and other airborne particles commonly found in barns and forage can inflame the airways. Horses kept in poorly ventilated spaces or exposed to dusty hay may be at greater risk. Over time, repeated exposure can lead to ongoing airway inflammation and more noticeable clinical signs.

How Veterinarians Diagnose It

Because the signs of equine asthma can be subtle, veterinary evaluation is essential. Dr. Couëtil discusses bronchoalveolar lavage, or BAL, as an important diagnostic tool for identifying inflammation in the lower airways. By collecting and analyzing cells from the lungs, veterinarians can better understand the nature of the respiratory problem and tailor treatment more effectively.

Treatment and Management Options

Managing equine asthma usually involves a combination of medical treatment and environmental change. Anti-inflammatory therapies and bronchodilators may help control clinical signs, but long-term improvement often depends on reducing exposure to airway irritants. Better ventilation, cleaner stable conditions, and forage management strategies such as soaking or steaming hay can all play an important role in supporting respiratory health.

What New Research Is Showing

The episode also highlights how research continues to improve understanding of equine respiratory disease. Advances in diagnostics, treatment strategies, and environmental management are helping veterinarians identify affected horses earlier and manage the condition more successfully. This is especially important for performance horses, where even minor airway inflammation can have a meaningful impact.

Why This Matters

Healthy lungs are essential for every horse, but especially for those in work. When asthma goes unrecognized, horses may struggle with performance, recovery, and overall comfort. Recognizing early warning signs and addressing them promptly can help reduce inflammation, improve quality of life, and protect long-term respiratory function.

The Takeaway

Equine asthma often begins with subtle signs, but those signs should not be ignored. As Dr. Couëtil explains, early recognition, accurate diagnosis, and thoughtful management can make a significant difference. For horse owners, paying attention to coughing, stable air quality, and veterinary guidance is key to protecting respiratory health.

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