The Biewer comes from two Yorkshire Terriers that were bred in Germany. Germany sees them as a tri-color yorkie. They did seperate them from the yorkies in Germany and set a standard for them so they could be shown. Most in Germany still breed back to the yorkie to increase the gene pool as it is very limited.
No where is there proof that anything has for sure been bred into the Biewer lines. They do test different because of the pieball gene but it is unclear if anything was bred into them at this point. |