Rowdy just turned two. I've heard that at that age most Yorkies get the coat they are going to have. But, since turning two, Rowdy's coat is getting curly. Our older Yorkie, Pixie, has a beautiful coat which is straight. Sometimes it curls a little around the edges. Rowdy is in a puppy cut right now and most of the curls are on his lower back. What's up with this?