I have a horse that I'm planning to lease out, and although he is a quarter horse, he is often confused as a thoroughbred or even warmblood because of his conformation and movement. I ride him english and have done some jumping with him, but was limited due to the small arena size. I've free-jumped him up to 4'7. I have also had many dressage riders say that I "NEED" to do dressage with him.
I know a sport horse is not a breed, but a type. Can I just stamp that name on him, or is there a registry I have to go through? In other words, can I advertise him as a sport horse without doing anything special?