I had a silky way back when... And they are VERY close to the Yorkies... their coat does not get nearly as long, but it still grows long.. their heads are a bit bigger their frames bigger and their bodies are longer, they are just bigger dogs yes... but are there breeders that will breed down their size just like breeders of the "teacup" (yes I know there is no such thing, I am just using the freaking word to get my point across
) yorkies. Their coats are a bit different too, my silky was so much easier to groom! the hair was a bit thinner and more silky.
Some person may have the mix and never know it cause they are Sooo close.. But the fact that this gal is not trying to "pass them off" as Purebred yorkies, says something to me... at least she's honest!! I don't really agree with the cross breeding thing... But like I said... at least she's honest! If she gives you a good health guarantee then all the better! If she is just to be a pet then who cares?? she'll look like a yorkie for sure! You will probably never know that she is a mix... but demand pix of the parents, that will tell you everything you need to know! You can see with your own eyes what they look like! and what your girl will look like!