Saw this little guy staked out in a front yard as I drove by. He looked to be approx 35 inches tall. FWIW note: Read an article about miniature horses being trained to guide the blind. Having raised quarter horses (which are very smart) for 20-years, I personally would never let a horse lead me anywhere. But it's an interesting thought.
Photoshopped out a distracting chain link fence in the upper right. Also eliminated the long red tether around his hooves.