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Biewer Yorkshire Terrier Mini Biewers need to be well socialised from an early age and must have enough daily physical and mental stimulation to keep them happy well-rounded dogs. They are prone to developing anxiety when they are left for prolonged periods of time. The breed was created in Germany after Yorkshire Terrier breeders discovered a pibald recessive genetic gene in one their pups. It has developed into an individual breed. Health Tests for Health The Biewer Yorkshire Terrier, a rare b