To Do Dressage...

...you need a big Warmblood that costs well into five figures. You'll have to stand on a grooming stool to saddle him. You'll be afraid to turn him out because of how much he's worth, so he'll be crazy from being stalled too much. Same deal if you take him on the trail.

I mean....that's what you ned to do Grand Prix dressage.

Or, apparently, you could just ride...

(Why yes. That IS a pony. A large pony, but a pony nonetheless).