I found a great thread on this site called, Yorkie Coats, Colors, and Puppy growth Chart Threads. There are tons of information. I really enjoyed reading it. I printed out the information, so I could compare it to my babies.
Hope you find it helpful!
My Meggie, turned white and then silver and now is turning a lite gold. Tori, is 3 1/2 months and looks bald on top because the hair has changed to a white. everywhere else it is a light gold. I sure hope her head continues to change and eventually turns gold.
Good luck with your baby.
Little-Bit, Meggie, Tori, Cassie and Roscoe's Mom.