I have 2-6month old yorkies and one is almost white and the other is just starting to get a spot about the size of a quarter on the top of his head that is grey so maybe he is a late bloomer or I also hear somewhere that puppies all look the same when they are born but have 2 different types of adult coats. One is "Black and Tan" and the other is called "Silver Blue" the second is most prefered... again this may be a rumor started by my breeder.