* Horse anatomy: Horses are not built for jumping such extreme heights. Their legs, while powerful, are not designed to support the force of jumping that high.
* Physics: The forces involved in jumping that high would be incredibly damaging to the horse's body. They would risk severe injuries to their legs, tendons, ligaments, and even internal organs.
* Record heights: The world record for the highest jump by a horse is held by a stallion named "Huaso" in 1949, who cleared a bar at 2.47 meters (8 feet 1 inch). Even this height is exceptional and a testament to both the horse's ability and the rider's skill.
While some horses are incredibly athletic and skilled jumpers, they are still limited by their physical capabilities and the risks involved in jumping extremely high.