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Biewer Yorkshire Terrier Mini Biewers must be socialized and mentally stimulated daily from a young, age. They are prone to developing anxiety when left alone for prolonged periods of time. This breed was developed in Germany when Yorkshire Terrier breeders discovered a piebald genetic recessive gene in one their puppies. It has evolved into a distinct breed. Health Tests The Biewer Yorkshire Terrier is a rare breed that was created in 1984 Germany through an evolutionary mutation. It is famous for its tri-colored coat and ha