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					Originally Posted by  bchgirl     And I'll try to explain.    
In 1984 the Mr Biewer bred their two standard yorkies and had a litter which had white...the result of a pie bald gene. What it meant was his two yorkies carried this gene and when paired together....both offered a recessive gene that resulted in the puppies coloring. How his original dogs got the gene is a mystery...that is where the question of another breed comes in. The answer is unknown and DNA parentage testing wasn't available. To answer your inbreeding question...yes it would've been necessary.   
The genetic diseases which affect yorkshire terriers is the same for biewers.   
And lastly ....parti yorkshire terriers have been born to a pair of standard colored yorkies.   http://www.yorkietalk.com/forums/bre...r-morning.html   |  
 
  
Thank you for answering my questions 

  Whichever breed they are or aren't they are beautiful dogs!