There are many shampoo's to choose from, but not every shampoo is for every dog.
I can't give you any personal advice on what I like, but I went and grabed a few reviews for you on shampoo's. MinkSheen is one many people have liked here.
http://www.yorkietalk.com/forums/sho...e+minksheen%22 http://yorkietalk.com/forums/showthread.php?t=85736 http://www.yorkietalk.com/forums/showthread.php?t=75814 http://www.yorkietalk.com/forums/sho...=%22shampoo%22
Here's also a thread I started about different shampoo's people liked/disliked
http://www.yorkietalk.com/forums/sho...ight=MinkSheen
Hope that helps...