The Singlefooter is not a breed but a type, a mix off many different breeds.
The registry NASHA (North American Singlefooting Horse Association) is strictly a performance-based registry regardless of the parentage. This would allow breeders of Singlefooters to have access to other gaited stock, to receive registration papers on animals which performed this natural gait without use of mechanical aids and shoeing techniques, that we as breeders as a group are working together as a group to widen the gene pool, by breeding to none related stock of many different breeds.