Do you condition her hair after shampooing? What are you feeding her? Sometimes diet can make a difference.
With that said, I've had 3 yorkies all with different kinds of coats. Daisy is the only one I've had with a silky coat. Abby's is cottony and Peanut was a red legged yorkie, so his coat looked a little nappy and didn't grow very fast.
I just had Abby's puppy coat cut off and now her hair is curling! It's so soft though
