The Yorkshire Terrier is one of the smallest dog breed of terrier type, and of any dog breed. The breed developed during the 19th century in Yorkshire, England. Ideally its maximum size is 7 pounds (3.2 kg). A popular companion dog, the Yorkshire Terrier has also been part of the development of other breeds, such as the Silky Terrier. It has a grey, black and tan coat, and the breed's nickname is Yorkie. The long coat on the Yorkshire Terrier means that the breed requires regular brushing. Although the AKC will not deny registration of a Yorkshire Terrier on colour alone, meaning that particolours are now registerable with the AKC, the Yorkshire Terrier Club of America has a directive that 'any solid colour or combination of colours other than black and tan' for adult dogs is a disqualification, and 'dogs of solid colour, unusual combination of colours, and particolours should be disqualified.'
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