A teacup dog is a dog that is smaller than a typical dog of that breed. Other terms may include pocket dog, tiny dog, and micro dog. [1] Teacup dogs are usually bred by mating two runts together. [2]
Teacup dogs have no exact size however they are smaller than the standard for their breed and often weigh under 5 lb (2.3 kg). [1]
Teacup dogs typically belong to the following breeds: Yorkshire Terrier, Toy Poodle, Shih Tzu, Maltese, Pomeranian, Chihuahua, and Pug.
Multiple health issues are associated with runts and teacup dogs. They may suffer from hypoglycaemia (low blood sugar); hydrocephaly due to the small size of the skull; portosystemic shunts; periodontitis and gingivitis due to the small jaw leading to problems with tooth growth; tracheal collapse; degenerative mitral valve disease; luxating patella and Legg-Calvé-Perthes disease; and hypothermia. [1]
Their small size can lead to problems with the dosage of certain medications such as flea treatment as most flea treatments and other anti-parasite medications are only labeled as suitable for use in dogs over 5 lbs (2 kg). [1]