Rini, I think that the genes are probably the same piebald gene in both, but with the parties they haven't been breed enough over here so the variations on where the coloring is, is still random with them. With the Biewers they have the white belly, 4 while legs, and supposedly 3 colors on the face area. These are the colors that all Biewers should carry in the right places. I'm sure that even with the Biewers in years to come they will get the coloring even more precise. So I think that's why the Biewers should be bred with Biewers just so the coloring will get stronger where it belongs...
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