PROCEDURE
There are several ways to take your horse's respiratory rate. Stand quietly at the left shoulder and watch the abdomen move slowly in and out. Count the number of inhalations (outward movements) in 30 seconds and multiply by 2 to determine the number of breaths per minute.
A second method is to listen to the horse's trachea with a stethoscope. To do this, stand on the left side of the horse. Use your left hand to place the stethoscope head in the center of the lowest part of the middle of the neck. Press in and wait there until you hear air passing through the trachea, a hissing sound. Count the number of inhalations (outward movements of air) in 30 seconds and multiply by 2 to determine the number of breaths per minute.
Air can also be felt with each exhalation at the nostrils. Place your hand in front of the horse's nose and count the number of exhalations in 30 seconds and multiply by 2 to determine the number of breaths per minute.
TIPS FOR SAFETY AND SUCCESS
You can assess your horses respiratory rate in three ways, watching their abdomen, listening to their trachea with a stethoscope, or feeling their exhalations at the nostril.
Try not to double count. Only count exhalations or inhalations, not both. You may not be able to hear respiratory sounds in a healthy adult horse unless you have experience and are in very quiet surroundings.
Horses that are sniffing may give a false respiratory rate.