Just curious, does anyone know how often a horse inhales/exhales at the trot? I'm asking because I was riding my horse the other day and noticed I could hear him breathing at the trot. I wouldn't say it was labored, but it was a noticeable sound. While we were trotting, it would be two beats silence, two beats sound, repeat. I'm pretty sure it was the inhale part that I was hearing. Is that the normal trotting inhale/exhale breathing rate? I get a little nervous because my horse has a heart murmer. Anytime I hear anything breathing related, I just take more seriously than I probably need to.