It depends on the age of the horse. A foal’s heart rate should be around 70-120 beats per minute (bpm), a yearling’s should be around 45-60 bpm, a two-year old’s should be around 40-50 bpm, and a normal resting heart rate for a horse should be around 38-40 bpm. A horse’s maximum heart rates can exceed 180 bpm during strenuous activities such as racing. If your horse has a resting heart rate of over 50 beats per minute, you should consult with a veterinarian.