I haven't seen anything mentioned about KC Yorkies on here so I thought I would mention them, I got my little girl Momoko from them (now almost a year old) and she has been a great dog, no major health issues, grew up to be a normal size (6 lbs). They say the breed both standard and tinies, but Momo was what they called a tiny, so I don't think they actually breed unhealthly small. They were ver nice ladies, the puppies were raised in ther ehome which I visited and was clean and full of happy yorkies. They are located about 70 miles out of Dallas Tx, I dorve from Houston to pick up my littl girl. They have some cute babies available right now too. Anyways..just wanted to give a good review about them on here.
http://www.kcyorkies.com/