What problems would a tennessee walking horse have in training level dressage?

mestenio_lara asked:

I want to know what challenges I am going to face if I want to train a full-blooded walker for dressage, and what are the differences between gaited dressage and regular dressage? Do they move differently than the classic dressage horses? Do they still trot? Please don't tell me to consult an expert, already doing that but so far no one knows how to help though I'm still trying. Can't find any books or websites on it iether....I'm just curious if its physically possible for them to do. Just how versatile are they? And how true is it that any horse can do training level dressage?

What are the best types of horses for dressage?

Dressage Girl asked:

I want to get a good dressage horse, and I am thinking of a German Warmblood, like a Hanoverian. Anybody have some other good breeds for upper-level dressage?