Also called the Prague Ratter, this rare and old breed originates from the Czech Republic. It was a favorite pet amongst Bohemian princes and kings, as well as other European royalty and aristocracy. Believed to be the smallest, tiniest dog breed in the world, it weighs between 2 to 6 pounds and is about 7 to 9 inches tall. It is even shorter than the Miniature Pinscher. The Prague Ratter has been selectively and carefully bred to be a companion dog. It has a lean and delicate body with a similarly delicate and fragile head. The neck is narrow and slightly elongated and the muzzle is narrow and fox-like. It has triangular and upright ears, dark eyes and a broad chest. Its skin is thin with short and glossy hairs. The most common colour is black and tan. Other colours range from brown and tan, blue and tan, yellow, red and merle.
This is an active and lively breed that has been used to hunt and kill rats even though it was specifically bred to be a companion dog. Its other talents include feats of agility, obedience and tracking. It is very obedient, social and loves playing with children but should not be exposed to small non-canine pets. The breed is intelligent, alert and gentle. They may show tendencies to be reserved towards strangers but to their family they are always affectionate and show much love. It has a highly developed sense of smell. Because of their thin skins, they should not be exposed to cold weather. They are good for apartment dwelling and can live for about 12 to 14 years.