Yeah, on Belle's papers, her "grandpa" is a TB and it says "TB" and also has a "T" in front of the registration number.
So you CAN register the cross of two appendix horses as appendix? I'm not breeding Belle, just curious. I love the look of appendix QH's, and so far from what little I've gotten to know of Belle, I love her temperament and sense.
LoL, there's just something about that "splash" of thoroughbred thrown in there, IMO.