Agree with RAyers, that was a complete failure of the description of a gallop. The front end is literally catching the massive thrust from the engine (and it’s an awesome feeling that every rider should experience, although my bet is very few do these days).
While it’s not the AA/OTTB question, I’m on a similar journey with an even more atypical breed. I’m a lifelong owner/rider of OTTBs who now has a fjord. Now that’s a breed with front wheel drive. You want to know what front wheel drive feels like? Might I introduce you to the light draft (and heavy)? When your breed’s existence has been defined by how well they did farm work, only then will you understand what it’s like to constantly be battling the forces of gravity
He’s my combined driving pony and we started doing ridden dressage about 4 years ago when he was trained to drive. While I’ve been well trained to train horses, and my flat work was solid in many disciplines, up to that point I owned no black tack and didn’t partake of the rectangular sand box. So we were both newbs except one of us had a solid background. The other was just… Solid.
But hey, nothing ventured, nothing gained, right? So off to dressage shows we went, and I’m not going to lie, learning as we went…
4 seasons later he has his 1st and 2nd level scores as well as breed awards in both levels which is pretty amazing since we really only ride regularly from May to Sept and the whole month of May is spent reminding this old body how to keep the sitting trot flopping around to the absolute minimum. This summer he’s just really upped his game in collection and extension, which is good since he’s going advanced in driving this season… But it got me to thinking that maybe he could get me a bronze medal too. He still thinks lead changes are a straight up waste of time but the rest of the 3-1 test is pretty damn good. So I took him to a schooling show with an L judge I knew delivered solid comments and scored in line with r/R judges to see how it went. Mid 60’s! I was genuinely surprised, but you know, we have a few points on the table so why not give it a try? Mind you, I don’t expect it will happen with the first 2 eligible rides like 1st and 2nd, because he’s not every judge’s cup of tea, but it’s also not unreasonable that he could do it if - and here’s the really important part - I am willing to do the hard work and I ride him like he’s a good horse, meaning I ride him like I believe he could do it.
Your horse is an individual with his own set of limitations or lack thereof. My horse is the same.
But I promise you, as a breed, a fjord is working a lot more against their build to work off their hind end than a TB, so there’s no reason by definition of being a TB that he can’t do it.