Biewers and Parti's all began the same way, from Standard colored yorkies who also carried recessive spotting genes. Both parents must carry these recessive genes in order for the tri color coat to appear. If one parent carries the spotting gene and the other parent does not, the pups will be traditional colored with maybe some white on the chest, chin and toes (some pups would be standard yorkies and some would be parti gene carriers that look like standard yorkies).
Until a few years ago, AKC parti's were not allowed to be registered with AKC but after numerous litters, parents, grandparents were DNA'd by 2 breeders (proving the off colored parti pups were the product of their standard colored parents), AKC allowed this color to be registered.
Biewers, (if I recall) came about the same way, only the German registry that they came from, would not allow the off colored (biewer) dogs to be registered, thus the Biewers began their own club and breed.
One of my AKC registered parti guys, is pictured in my Avatar. |