The Parti-color and the Biewer are both based on the piebald recessive gene.
This is from the biewer breed description. Ok Rose, Rini explain this please, is the biewer based on the same piebald gene or is it a cross between another breed (like a ****-zu or maltese)
The Biewers are the same piebald gene, not a cross.--I'm being bold and answering for Pat and Rini, sheeesh ,oh and thanks for spelling correctly, my pet peeve. 