From Kathy's post:
We should give suggestions to folks on some of the things to look for, and ask when interviewing a breeder. It would be informative to tell new owners some of the health issues and habits that yorkies have and what to look for. Notice I said interviewing in a previous statement - you have all the power -you can walk out the door and go elsewhere for a puppy. You should place as much time and research into the purchase of your new puppy as you would for any major purchase.
Check out this site:
http://www.breeders.net/checklist.html
There's also one for interviewing prospective parents but I don't remember where. Sylvia