What comes to mind when you think about asthma? For Dr. Laurent Couetil, horses are top of mind.

Why horses?

"There are really only two species of animals that also have asthma," Dr. Couetil shared. "Besides horses, it's cats."

Dr. Couetil is a researcher at Purdue University in the College of Veterinary Medicine.

His focus is to learn more about asthma in horses what causes it and how to treat it.

"Hay is actually the main type of feed they are allergic to," Dr. Couetil shared. "The dust in the hay."

When visiting the Asthma Herd (as the group of asthmatic horses at the university is affectionately called), I noticed a sign that said "no hay" outside their pasture.

Just like humans, asthmatic horses don't deal well with dust.

To measure the dust that horses are encountering, Dr. C

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