Really small horses are awesome. Zachariah is a really small horse.
According to this site, the large horse is named Strawberry, and is meeting with cool tiny Zachariah. Granted, Zach is a baby, but the difference between the two horses is four feet! Imagine meeting someone who was four feet taller than you! I'd probably shart if that happened.
Zachariah didn't shart. He acted taller than his frame, and stood out amidst his larger company. Well played, Zachariah! For that, I bestow upon you the honor of being the MPotD.