Horse anatomy
Nostrils
The openings of the nose. Bring air in and out when the horse breathes.
A closer look
The nostrils are the two large, flexible openings at the front of the muzzle. They lead into nasal passages that warm and filter air on its way to the lungs. Horses breathe only through their noses, not their mouths, and they can open their nostrils wide when they need more air.
Why it matters
Because horses are nose breathers, anything that blocks or irritates the nostrils affects their breathing. The nostrils also give clues about health and mood: flaring, snorting, and any discharge can all tell you something.
Care tip
Check the nostrils when you groom. A little clear moisture is normal, but thick yellow or green discharge, bleeding, or a bad smell should be reported to an adult right away.
Common mistake
A loud snort does not always mean a horse is upset. Relaxed horses often give a soft, fluttering snort as they settle into work, while a sharp blast with a high head and wide eyes usually means alarm.
Fun fact
Nostrils can flare wide during exercise.
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