Respiratory problems in horses: equine asthma and prevention
Informational content. It does not replace the diagnosis or treatment of a veterinarian. For any sign of illness, always consult a professional.
Horses' airways are sensitive, and chronic respiratory problems are a frequent cause of loss of performance and well-being. Environmental management (dust, ventilation, forage quality) plays a decisive role. This informational guide reviews the essentials of equine respiratory health.
The Equine Respiratory System
The horse is an athlete whose breathing is coupled with the gallop and who breathes exclusively through its nose. Its performance depends on healthy airways. When they become chronically inflamed, coughing, difficulty breathing, and a drop in performance appear, even at rest in advanced cases.
Equine Asthma
What was traditionally known as chronic obstructive pulmonary disease is now encompassed under the term equine asthma. It is a chronic inflammation of the airways, frequently triggered by the inhalation of dust, mold spores from hay, and poor stable ventilation. It causes coughing, nasal discharge, difficulty breathing, and, in chronic cases, the so-called heave line on the abdomen.
The Role of Dust and Hay
Dust and spores from hay and bedding are the main environmental triggers. Dusty or moldy hay, poorly ventilated stalls, and dusty bedding aggravate the problem. Soaking or steaming hay, using low-dust bedding, and improving ventilation are management measures with a significant impact.
Stable Ventilation
Good ventilation is one of the best preventive measures. Enclosed, damp stables concentrate ammonia (from urine) and particles that irritate the airways. Stalls with cross-ventilation, air outlets, and time outdoors in a pasture significantly reduce the respiratory load. Paradoxically, many horses breathe better outdoors than in their stalls.
Preventive Management
Prevention combines: quality forage (soaked if there are problems), low-dust bedding, good ventilation, time outdoors, and avoiding working the horse in very dusty environments. In already affected horses, the veterinarian establishes the treatment, but without good environmental management, no treatment is fully effective.
Frequently Asked Questions
Why does my horse cough when it starts working?
An occasional cough at the beginning can be normal, but repeated or persistent coughing suggests irritation or equine asthma and warrants veterinary review.
Does soaking hay help?
Yes. Soaking or steaming hay reduces inhaled dust and spores, one of the most effective measures for horses with respiratory problems.
Is a stall or pasture better?
For respiratory health, time outdoors is usually beneficial: many horses breathe better outside than in enclosed, dusty stalls.
