Equine asthma—previously called recurrent airway obstruction (RAO) or heaves—is an allergic respiratory condition in horses. It’s often compared to human asthma and is triggered by exposure to dust, mold, pollen, or other airborne irritants. Left unmanaged, it can severely impact your horse’s performance and quality of life.
Common Triggers of Equine Asthma
- Moldy or dusty hay and bedding
- Poor ventilation in barns
- High levels of airborne allergens like pollen or ammonia
- Cold, dry air during winter months
- Extended time in indoor environments
Symptoms to Watch For
- Frequent coughing, especially during or after exercise
- Increased respiratory rate or labored breathing
- Nasal discharge
- Flared nostrils and heaving flanks
- Reduced stamina and exercise intolerance
Support & Management Tips
- Switch to dust-free or soaked hay and low-dust bedding
- Ensure proper barn ventilation and reduce time in stalls
- Turn out horses as much as possible in fresh air
- Keep stalls clean and free of ammonia buildup
- Work with your vet for diagnostics and treatment protocols
Why It Matters
Equine asthma isn’t just a performance issue—it affects your horse’s ability to breathe, recover, and thrive. With consistent environmental changes and supportive care, you can help your horse manage symptoms and breathe easier year-round.
