i would suggest
Dog Breed Info Center®, DBI and
Canine Reproduction Video and Book on Breeding and Whelping dogs by Debbie Jensen for dog breeders and Whelping Supplies needed to deliver puppies.
just a head up about a year ago i was on petfinders.com and they had a beautiful akc female someone gave up and she was $1000!!..its basically stated that her fee would help cover all the other sick yorkies in the shelters (which is understandable) ..and for other yorkie rescue groups the younger the pup the higher the price..some are 600 some are 450 and the senior pups are like $175..and i know they all need love but i dont want to bring home the senior because whose to say how long it has, the baggage it has and of course i have kids so they would never approve me.
and you know when you are looking for something you never find it and the moment you stop or you buy it..poof there it is...i only saw a yorkie once in the local shelter here and it was gone in a matter of minutes because they have waiting list..pages and pages long for yorkies and other small breeds..so sometimes the best route is a breeder..im not saying what this poster is doing is right OR wrong ..just that not everyone likes the same cup of tea..know what i mean?
she is too young...hopefully its a false..but there have been cases where younger females gave birth and they were ok..but sometimes the breeder is left doing all the hard work because she is too young and those instinks havent kicked in...just be prepared for bottlefeeding every couple of hours or holding mom down every couple of hours if she is pregnant...and had babies
you can pm me...i wont pass any judgement (not that anyone has or meant to)..good luck!!