The American Kennel Club does not recognize a parti-Yorkie; it recognizes one Yorkshire terrier, a spirited little dog who weighs up to 7 pounds. According to the breed standard, a fully grown Yorkie is two colors: a dark steel blue and tan. A parti-Yorkie is a three-color Yorkshire terrier and doesn't meet the American Kennel Club's breed standard for color.
Yorkshire Terrier Coat Colors
Yorkshire terrier puppies are born black and tan, growing into their blue and tan pattern as they mature. According to the breed standard, the colors should not be intermingled, but should remain separate. The color blue runs the length of the dog's body, from the base of the neck to the end of his tail, while the tan is on the sides of the head, muzzle and ears, as well as legs. The only marking allowed on a standard Yorkie is a white spot on the forechest, no more than 1 inch at its longest or widest point.
A parti-Yorkie is a tri-colored dog, sporting more than a bit of white in his coat. The Yorkshire Terrier Club of America states that unscrupulous breeders may claim the parti-Yorkie is a rare breed to charge premium prices for the puppies. As a result, the club determined a third color would be a disqualifying trait. No matter how many colors are in the Yorkshire terrier's coat, he's a high maintenance dog, requiring daily grooming to maintain a show coat. A puppy clip is a little less work, but requires regular visits to the groomer.