When you have a breed that is blue (as 99.99% of adult Yorkies are), this diluted coloring gene can lead to washed out coats.
Black becomes dulled. Tans are creamier.
The ‘true’ colors of the breed can start to appear faded.
In addition, when you have a breed that has a silky coat, over generations the coat can become overly thin. So, what can you do to bring strong color back? And to improve coat texture? And while doing this, NOT introduce another breed?
For quite a long time, serious breeders (at least those who know about red legged Yorkshire Terriers) use this to add color and texture back into the bloodlines.
A Red Legged Yorkshire Terrier can produce more Yorkies with red, so those offspring should not be bred.
However, that one introduction into the program can bring strong coloring and quality textured hairs
into future litters.
As you can see from these photos, Yorkies that stay black and have red are exceptionally beautiful and are a needed special type of Yorkies that will be beneficial to the breed as whole.