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
Russkiy Toy written in 1966 and authorized by the Ministry of Agriculture. In 1988, the Russian Kynological Federation published a new breed standard, combining the short-coated Russian Toy Terrier and the long-coated Moscow Toy Terrier under "Russian Toy Terrier." However, after the fall of the Iron Curtain in 1989, the popularity of imported exotic breeds nearly drove the Russian Toy into extinction. A resurgence occurred thanks to a new energetic generation of dog breeders, but the breed remained virtually unknown outside of Russia until the 1990s. Several kennels have now been established outside Russia, the most successful ones located in Finland, Estonia,