Young horses with acute, severe respiratory infections..

I'm increasingly seeing young horses with snotty noses, fevers and abnormal lung sounds...lungs with wheezes and clicks similar to older horses with heaves...These are young horses of training age, 2-4 years old, in multi-horse stables.  The older animals are not getting sick.  We'll be testing any new cases for equine rhinitis A virus infection as well as influenza and rhinopneumonitis.  A vaccine is available to help protect against equine rhinitis A virus....interested?