Pražský Krysařík

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Pražský Krysařík
Prague Ratter.jpg
Pražský Krysařík
Other namesPrague Ratter
Common nicknamesPrazsky, PK
OriginCzech Republic
Height 20–23 cm (7.9–9.1 in)
Weight 1.5–3.5 kg (3.3–7.7 lb)
Coat short, smooth and glossy
long and fringed
Colour black and tan, brown and tan, blue and tan, lilac and tan, fawn, red, pink, merle
Litter size 1-3
Life span 12-14 years
Kennel club standards
Czech Kennel Club standard
FCI standard
Dog (domestic dog)

The Pražský Krysařík (Prague Ratter) is a small breed of dog from the Czech Republic that is rarely seen outside its country of origin. It is the smallest breed in the world by breed standard, because of the maximum height of the dogs, unlike Chihuahuas who are measured by weight.



Also known as the Pražský Krysařík, and often confused with the Chihuahua and the Miniature Pinscher, the Prague Ratter is a small toy dog. Ideal height is 20 cm to 23 cm, being 2 cm shorter in maximum height than the minimum height of the Miniature Pinscher. Adult weight is mostly between 1.5 kg to 3.5 kg. Generally the best weight is 2.6 kg.

There are two coat variations:[1]

  • short: smooth, glossy and thick
  • long: fringes on ears, limbs and tail

The most common color is black and tan, which is also the original color. Lately, other colors have been approved: brown and tan, blue and tan, lilac and tan, yellow, pink, red and merle.


Best known for its active and lively nature, the Prague Ratter is a spunky breed that is full of original character. These tiny dogs thrive on strong and dependable relationships with humans, love to receive affection and play the role of lap dog during down time. This breed is highly intelligent and generally responds well to basic training and commands. As a pet, the Prague Ratter is obedient, loyal, loving, and very affectionate. The Prague Ratter adapts well to full-time indoor and apartment living, yet still enjoys spending time outdoors, playing games such as fetch, and taking long and leisurely walks. They are also known to be a very quiet dog, unlike many other small dogs who tend to be very "yappy". Like any small dog, one should be wary of allowing them to develop Small Dog Syndrome, as they can become aggressive if they are not well-socialized from an early age.


Due to its need for human attention and eagerness to please and impress its owner, the Prague Ratter generally responds well to basic training and commands. This bright breed has the ability to learn to perform many impressive tricks and tasks. Many owners claim that these dogs can easily be taught to use a litter box, thus eliminating the need for constant trips outdoors.

Establishing immediate trust and respect is key to successfully training the Prague Ratter. These dogs can be somewhat sensitive to criticism and respond best to positive reinforcement and reward-based training.

Areas of use[edit]

Prazsky Krysarik might be small, but is nevertheless an easy dog to train as long as it is treated consistently. It can be trained for agility, freestyle, obedience, tracking etc.

The sense of smell and hearing is highly developed, and Prazsky Krysarik is still a great rat hunter, just as its original purpose was. They have a high prey drive and will readily go after squirrels, rats, and mice.


The breed was popular in central European royal palaces in the Middle Ages. It was already an established breed by the time of the rule of the Polish king Bolesław II the Generous (1058–1081). He became fond of the Ratter and had two of them imported from Bohemia. As their name suggests they were also commonly used as rat catchers in rural and urban households.

The popularity of the Prague Ratter started to decline in the 19th century when the Miniature Pinscher became more fashionable. The breed went through a renaissance in the 1980s as Czechs and Slovaks started to breed them again.

In 2019, it became an FCI acknowledged breed. There are only about 6,000 Prague Ratters registered in the world and they usually only have 1-3 puppies per year. They are nevertheless presented at shows in the Czech Republic, Slovakia, and Scandinavia.


Subject to bone injuries due to their small size. Also subject to patellar luxation, an ailment common to small breeds. Krysariks can also have retained baby teeth, which may need to be pulled to prevent further problems with dentition.

Life expectancy[edit]

The Prazsky Krysarik has a life span of 12 to 14 years.


  1. ^ FCI-Standard N°363: Prague Ratter. Federation Cynologique Internationale.

External links[edit]