Although asthma symptoms generally worsen in the winter for horses because of the cold, dry air, summer weather can also “stirrup” trouble for horses with a specific form of asthma — summer pasture associated asthma.
“Equine asthma — also known as inflammatory airway disease (IAD), recurrent airway obstruction (RAO), or ‘heaves’ — is a common condition of the horse,” said Dr. Amanda Trimble, a clin…