I'm far from an expert in the matter, but I did find our a couple of things. First they only have 6 dogs they are finding homes for, and only one yorkie so that seems good. I mean it doesn't look like they work for breeders.
Pet Search Results: Adoptable Pets in Winston-Salem, NC: Petfinder
Also the name of the contact is Lisa Caroll, and here is her facebook page:
Lisa Carroll | Facebook
If you look at that, you will find this link:
The Perils of "Free To Good Home" Ads, which has lots of great tips on finding a good home for your pet, should you need to rehome, so this is also a good sign.