Toy dog term teacup dog, thus the toy/teacup boundary remains fuzzy. The standard size for a toy dog ranges from 4 to 7 pounds; anything smaller than the standard size of a toy dog may be a runt of a litter. No official size defines a teacup dog, but unofficially a teacup dog is considered to be a dog that is 17 inches or less and weighs 4 lbs or less at the age of 12 months. There are no specific teacup dog breeds, but popular types for breeding teacup dogs include: Shih Tzu, Chihuahua, Yorkshire Terrier, Poodle, Pug, Maltese, Pomeranian, and
Fox Terrier 1909. Following the popularity of conformation dog shows, the Fox Terrier was the result of selective breeding. For instance, by 1949, 120 of 140 Wire Fox Terrier champions were descended from a single championship-winning dog. There are two main breeds of Fox Terrier, Smooth and Wire, both of which originate in England. In addition, there are several descendant breeds which have been developed in a variety of countries. For example, the American Toy Fox Terrier was developed from the Smooth Fox Terrier, Italian Greyhound, Manchester Terrier, Miniature Pinscher and Chihuahua breeds. Both major types of Fox Terrier are mostly white