[matese]

Originally Posted by pstinard

Biewers and Yorkies are separate breeds, despite their resemblance in physical appearance. They can be distinguished by genetic testing. But to answer the OP's question, unless the Yorkie is a carrier of the piebald or parti-color gene, the offspring of Biewer by standard Yorkie are going to resemble the standard Yorkie in color, with possibly some small white highlights, as mentioned previously. The offspring of such a cross are called "splitters" because they're heterozygous for the gene responsible for Biewer color. If you're trying to breed purebred Yorkies or Biewers, it's definitely a bad idea to cross the two together. Yorkies are supposed to be bred with Yorkies, and Biewers are supposed to be bred with Biewers.

agreed