Unless you want to breed or something, does it really matter, you are already in love and that's what counts! I don't know a lot about it but I heard that a little white as a pup meant the adult would be lighter colored. But you have to consider the source, it was from a breeder trying to sell my friend a puppy. It will be interesting to hear what the experts here at YT have to say about it though. Good question, not weird at all! I'm happy that you found a yorkie to love, congrats!