i found this in the sticky thread about colors:
"Yorkshire terrier puppies can be born of colors that automatically deprive them of the necessary qualities to become the proper colors of the breed. They can be born all black; all tan; tan with black-points, tri-color;: black, white, and tan; all blue; bluish grey with tan-points, and so remain or change to another shade of their newly-born colors. Two heads and eight legs is considered an undesirable trait."
Hope that helps |