that is so harsh. and that animal shelter is rediculous for not owning up to their own mistakes by providing misinformation on their own website. the new owner is probably so happy they got a yorkie for a small adoption fee that they don't care about the bond that already exists between Baby and her original mommy.
if it were me, i would have raised such a stink and would have stayed at the shelter until the new owners came by to pick up MY furbaby. or rather... TRY to pick her up.