they are a yorkie....just with the pie bald gene......they happened by accident and were not actually gonna be sold....but everyone seeing them started asking for pups and offerning a lot of money for them.....it is described as a gene mutation......and they are just starting to be recognized as a breed themselves....you can only get purebred puppies reg in germany right now....but both akc and ckc are considering it......our little smokey is the result of a standard yorkie mom and a biewer daddy.....hope this helps