Cowboy Magic is the most incredible grooming aid on the face of the earth. It started as a detangler and shine -er upper for Horses and Humans. But.... the Yorkie Folk have caught on. You massage a dab into a nasty matt and like MAGIC, the matt dissappears.
You can get Cowboy Magic a lot of different places. I got mine at the Tractor Supply Store here in town -- others have bought it on line.