My name is Roberto Krah and I`m owner of the"Art of Highclass" Kennel. It is true. The Biewer Yorki is developed before 20 years from a MUTATION.The parents of the 1. Biewer Yorki are original Yorkshire Terrier. On our Hompage "htp://www.Biewer-Yorki.de.vu" can you see that the Biewer Yorkshire Terrier is a correct Yorki!