Temperature: 99°-101°F. The temperature may increase by 2 or 3 degrees due to the ambient (outside) temperature, level of exercise, or degree of dehydration. A horse's temperature is taken rectally, using a digital or fluid thermometer.
Pulse/Heart Rate: 32-48 beats per minute. Younger horses usually have a higher heart rate than older horses. Age, ambient (outside) temperature, humidity, exercise, and excitement can all have an effect on a horse's heart rate. A horse's pulse can be taken on the inside of the jaw, or on the ankle. The heart rate can also be checked using a stethoscope over the ribs, just behind the elbow.
Respiratory Rate: 12-16 breaths per minute. Like the pulse rate, respiratory rate can be influenced by environmental factors and excitement/stress. The respiratory rate can be measured by watching the nostrils or flanks and counting the number of times the horse breathes out. If the respiratory rate exceeds the heart rate, a veterinarian should be contacted immediately.