Strong Breathing Through the Nostrils
Look at the signal, then look at the whole horse and the situation around it.
NOTICE
Breathing through the nostrils becomes noticeably stronger, faster, noisier, or more effortful than usual.
This signal is about how the horse is breathing, not simply the shape of the nostrils.
WHAT IT MAY TELL YOU
Stronger breathing can happen after exercise, during excitement or high arousal, in hot conditions, or when the horse is working harder to breathe.
DON'T ASSUME
Strong breathing does not automatically mean fear, pain, or respiratory disease.
LOOK AGAIN
Think about what the horse has just been doing and watch how the breathing changes.
Does it settle normally after exercise? Do you also notice coughing, unusual noise, continued nostril flare, extra effort through the abdomen, weakness, or difficulty recovering?
SAFETY
If breathing looks unusually difficult, does not settle as expected, or appears with distress, marked weakness, persistent coughing, abnormal respiratory noise, or obvious effort while the horse is at rest, contact a veterinarian promptly.
Research / Learn More
What research suggests
Visible nostril widening can accompany increased breathing demand, but nostril shape and actual breathing effort are not the same observation. Clinical respiratory assessment also considers rate, effort, noise, recovery, and the horse's overall condition.
What that does not mean
Strong breathing after exercise can be normal. Breathing that remains labored or unusual while the horse is at rest is a different situation and deserves closer attention.
Sources
- EquiFACS — separates visible nostril dilation from other facial actions, supporting careful observation before interpretation.
- EquiFACS for pain-related facial responses — shows that nostril dilation can occur in pain contexts, reinforcing why surrounding signs matter.