i bath once a week with either Pet Silk or Tropiclean shampoo and conditioner. They can last a week TOPS around here. There is a member selling the Tropiclean for a steal! I used it for the first time the other day and loved the smell! Here's the link:
http://www.yorkietalk.com/forums/yor...mpoo-sale.html
Yorkies are not like other dogs and need to be bathed more often. Using a good dog shampoo with also keep their hair and skin looking great!