[Jacksmom052709]

Please go read some of the posts under the Breeder section here. I don't advocate breeding any dog

1) If you are not an experienced breeder.
2) If you are not breeding for the betterment of the breed (which if you are mixing with a Biewer, that is not for the betterment of the breed)

And there are way too many other things to consider to list here - they have been listed on other posts.

Biewers are a breed of their own now, even if they were descended from Yorkshire terriers.

And if you are concerned about mixed pups - then you really have your answer to NOT breed her. Please read some of the posts here and educate yourself.