Welcome to Yorkietalk! I suggest you read the following threads, they'll answer your "teacup" question, and direct you on how to find a reputable breeder. Any other questions you may have please feel free to post!
http://www.yorkietalk.com/forums/yor...ead-first.html http://www.yorkietalk.com/forums/yor...ease-read.html http://www.yorkietalk.com/forums/yor...ead-first.html http://www.yorkietalk.com/forums/yor...uch-thing.html
Also, check the YTCA website. It's the mother club for the Yorkshire Terrier and it has a breeder referral page. Good luck on your search!