[whispersmom2]

Originally Posted by I_love_lucy

Just looked at that site and I never realised that you shouldn't breed 'american yorkies' to biewers. Does anyone know why? Not that Im planning to, Im just interested

When a USA Yorkie is bred to a Biewer, there is always a chance that they get will not be Biewer standard for the color-specific areas of the coat. I don't know that there would be such a risk of that happening if you breed a US parti that has a long pedigree that is all parti colors. I am sure there are other differences but that is what comes to mind.
I have both-Biewer females and 1 male and a USA born parti male that has the exact coloring and pattern that is included in the Biewer standard. However, there are 2 standards for Biewers.
I would be more than happy to send someone pics of my parti boy and Biewers but I have not mastered the technique for posting pics myself. Sometimes, I accidently do it..LOL