I've heard not to brush your yorkie dry (which makes no sense to me....don't they say the opposite about human hair?!

)
But what about while they are still in their puppy coat? At nine weeks, she has what I would consider thick and cottony hair (though I understand it will/might/could change), and I try to brush it daily. Am I damaging it if I brush it dry?!
She attacks the brushes too, and I'm sure I should be discouraging her from that

, but she has so much fun with it. At least when I have her wrestling with one brush, I can be running another through her hair.