His name is Jasper, and I’ve had him for almost five years. He’s the gentlest horse I’ve ever known—loyal, calm, and curious around new people. He’s never acted out. That is, until that morning. We were heading out for a short trail ride, with plans to stop by a community event at the local county fairgrounds. The mounted police unit was scheduled for a public meet-and-greet, and I thought Jasper would enjoy seeing the other horses. As we walked up…