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
Toy Manchester Terrier Tan) has also declined, to the point where it is listed by the Kennel Club as being in danger of extinction. In order to rescue the breed, the Kennel Club has opened the stud book to allow certain selected examples of the North American Toy Manchester Terrier to be registered and bred as an English Toy Terrier (Black & Tan). However, the two breeds are not considered to be identical, and the standards for the two breeds show different requirements. The Toy Manchester Terrier in North America is a small, long legged dog with a short coat marked with tan,