as i have seen from the post here, the breeder will not be forthcoming about the size of the yorkie. i have also seen where they have a very large female to mate w a small male to try and get as many pups as possible. so you can end up w a larger pup like the mommy. it happened to me. my yorkie is larger but i love every bit of him.
__________________  lisa lisa and the cult jam yorkies |