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About the Prague Ratter
The Prague Ratter, known in Czech as the Prazsky Krysarik, is one of the world's smallest dog breeds and one of Europe's most ancient companion breeds, a miniature ratter and courtly companion with a history that can be traced back to medieval Bohemia, where it served as both a practical ratter in homes and royal residences and as a favoured companion of the Bohemian and Polish nobility. Historical records suggest that the breed was gifted between royal courts across central Europe in the mediaeval period and appears in Czech royal portraiture. The breed's numbers declined significantly in the twentieth century and it came close to extinction before dedicated Czech and Slovak breeders revived and standardised the breed from the 1980s onwards. The Prague Ratter is recognised by the FCI and registered by the Kennel Club in the Toy Group, though it remains rare outside central Europe. The Prague Ratter is a tiny, fine-boned and elegantly proportioned dog of upright carriage and alert expression. The smooth, short and glossy coat comes predominantly in black and tan, though other colour combinations occur. The large, dark eyes and upright ears give the face a bright and alert expression. The breed is one of the smallest in the world by height - adults typically stand 20 to 23 centimetres at the shoulder and weigh 1.5 to 3.5 kilograms. The character is alert, lively, devoted and affectionate - a small companion with real intelligence and the historic dual role of ratter and court companion evident in its combination of watchfulness and personal devotion. The Prague Ratter forms a deeply close bond with its own person, is active and agile for its size, and retains the alert, watchful quality that made its ancestors useful as small guards and ratters. It can be reserved with strangers and this wariness should be addressed through early and thorough socialisation. The very small size is a practical welfare consideration that cannot be ignored. The Prague Ratter is genuinely fragile and requires handling with care, a household where the risk of accidental injury from rough play or dropping is managed, and the use of a harness rather than collar to protect the delicate neck. Health considerations include Patellar Luxation, dental disease and Leg Perthes Disease. Hypoglycaemia is a management concern in very small individuals. Purchase prices from registered breeders range from £1,000 to £2,500. Import from Czech or Slovak breeders is often required. Monthly running costs average £50 to £90. Czech and Slovak breed clubs are the primary resources for breed information, responsible breeders and health testing guidance.
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How much exercise does your Prague Ratter really need each day?
Twenty to 30 minutes daily is genuinely sufficient, but it needs to be done thoughtfully. The Prague Ratter is agile and energetic for its size but the very small body means exercise should stay moderate. I walk mine on a harness rather than a collar, and I am quite firm on that point: the neck on a tiny dog is fragile and a collar is not appropriate. She gets a short walk morning and evening, plus indoor interactive play and training games that engage her mentally. The mental stimulation side matters more than many people assume for this breed. She is alert and quick-minded and benefits from training sessions and puzzle activities. On wet or cold days, indoor play and training cover the base effectively without asking her tiny body to manage conditions it is not built for. The exercise needs are genuinely modest, but you still need to provide consistent engagement rather than just assuming a small dog will entertain itself.
30 June 2026
Any health issues to watch for with Prague Ratters?
Patellar luxation is the primary hereditary concern and I would check that parents have been assessed before buying any Prague Ratter puppy. Dental disease is essentially inevitable without active prevention in a dog with such small jaws, so I would start tooth brushing from week one rather than waiting for a problem. Hypoglycaemia, low blood sugar, is a real management concern, particularly in very small individuals and puppies: watch for weakness, disorientation or lethargy and know how to respond. Legg-Calvé-Perthes Disease, avascular necrosis of the femoral head, has been documented in the breed and is worth being aware of as a cause of lameness in young dogs. The fragility of the breed is also a practical welfare consideration that does not show up in a health screening list but matters day-to-day. These are very small dogs and injury risk from falls, being stepped on, or rough handling is a real concern. Thoughtful management of the environment reduces that risk significantly.
30 June 2026
What's the one thing you wish you'd known before getting a Prague Ratter?
That the close bond this breed forms with its person is profound in a way I was not quite prepared for. She is devoted to me in a way that requires thoughtful management. The wariness with strangers is genuine, it is part of the ancient companion and watchdog character, and early socialisation makes a meaningful difference to how that expresses itself in everyday life. I socialised her thoroughly as a puppy and she is cautious rather than anxious with strangers, which is a reasonable outcome for this breed. The other thing I wish I had fully understood before getting her is how much patience the training requires. She is responsive and quick-minded, but she is also sensitive and does not respond to any kind of harsh correction or impatience. Gentle, positive reinforcement from the start produces a confident, engaged dog. Push too hard or get frustrated and she withdraws. The patience is not optional. Approach her correctly and she is an utterly characterful, engaging companion unlike anything else I have owned.
30 June 2026
What do you feed your Prague Ratter, and why?
A high-quality complete food formulated for very small or toy breeds, given twice daily in small amounts. The toy-breed formulation is not just marketing: kibble size and calorie density are actually relevant at this scale. Hypoglycaemia is a real concern for very small dogs, particularly as puppies, so regular small meals rather than one or two large ones is the approach I take. I am very disciplined about dental hygiene alongside feeding because dental disease in a tiny-jawed dog without intervention is a near-certainty. Daily tooth brushing, appropriate dental chews counted within her daily allowance, and vet dental checks at every appointment. It takes consistency but it is far less costly and unpleasant than treating advanced dental disease in a dog too small to sail through major procedures easily. I keep treats minimal and within her daily calorie total. Tiny dogs have very little margin for excess calories.
30 June 2026
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