I've read some really good things about the CC wooden pin brush, and that's said to be wonderful with mats. If you are thinking about getting a steel pin brush, maybe you want to consider the Maden Pin brush, one of our members sell them, and they are an extremely good value. Puppies do mat more than older dogs, and I used Cowboy magic detangler when Joey was a puppy, especially under his arms after he wore clothes. Some people recommend cornstarch. Here's a link to Maden brushes.
http://www.yorkietalk.com/forums/yor...shes-sale.html.