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
Fault (dog) do with the individual dog's ability to work or suitability as a pet. Faults are formally defined in reference to the breed standard of the specific dog breed, and, due to the extreme variability of the dog ("Phenotypic variation among dog breeds, whether it be in size, shape, or behavior, is greater than for any other animal"), a single set of faults cannot be generically described for all dog breeds. Wikipedia articles for individual breeds should describe what are considered faults in that particular breed. "Faults" are evaluated as part of the judging process in conformation shows. As the purpose