I have been goggle'n Biewers all day trying to figureout how and what exactly they are. Diggy has more and more white...not tan coming out. above eyes, chest, and his chin. I read some yorkies have this and it goes away but he is 14 weeks and is only getting whiter and bigger????? Not sure if you can tell from this pic but it was last week and the white is bigger and whiter today. Im just curious.