Raas Cat
Updated July 19, 2026
The Raas, or Busok, is a rare Indonesian island landrace under formal development, known especially for a solid blue-gray coat, muscular moderate body, angular face, upright ears, and a tail that may be shortened or kinked.
Athletic, Alert, Potentially reserved, Strong-willed in informal accounts, Insufficiently studied
8-15 pounds (developing descriptions)
Unknown; no reliable population study
At a Glance
Maintenance Level
Affection Level
Energy Level
Good with Kids
Vocalization Level
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About Raas Cat
The Raas, or Busok, is a rare Indonesian island landrace under formal development, known especially for a solid blue-gray coat, muscular moderate body, angular face, upright ears, and a tail that may be shortened or kinked.
Coat Length
Short Hair
Breed Group
Natural
Weight
8-15 pounds (developing descriptions)
Great For
What Makes Raas Cats Special
The best-documented Busok image is a solid blue-gray, shorthaired cat with an angular head, upright ears, firm athletic body, and a tail ending in a bend; formal standards are still evolving.
Published popular descriptions conflict on size, tail length, eye color, and whether the rare brown shade is chocolate or cinnamon, so precise claims require an IBRA or FFF registration record.
Raas Cat History & Origin
This domestic-cat landrace formed on Raas Island in the Madura archipelago of East Java. Local tradition treated the blue Busok as a prestigious animal and gift for nobles or religious leaders, while stories discouraged removing intact cats from the island; modern Indonesian groups are now documenting and conserving the population.
Indonesian government and BRIN publications identify Busok as an endemic native cat associated with Raas Island.
The Indonesian Busok Raas Association coordinates a modern standard, pedigrees, exhibitions, and conservation breeding.
International registry status remains developing and should be stated with the registry and class rather than as universal recognition.
Raas Cat Characteristics
Individual Variation
Cats are individuals and not all cats, even those of the same breed, will exhibit all the same qualities.
Care Requirements
Exercise Needs
Grooming Needs
Shedding Level
Raas Cat Appearance
A moderate, firm, muscular island cat, larger in local descriptions than an average village cat, with balanced athletic limbs and no cobby or extremely Oriental exaggeration.
The celebrated Busok coat is plain blue-gray and relatively thick for a local shorthair; developing standards also document black and brown-dilution colors and shortened tail classes.
Physical Features
Ears
Medium to large, pointed, upright, and alert, set high enough to reinforce the angular head.
Eyes
Moderate to large and expressive; reliable public sources do not establish one universal eye color, so clear healthy eyes and documented standard compliance matter more than folklore.
Nose
Medium in length and width, proportionate to the tapering face without an extreme stop.
Coat & Build
Tail
Variable in developing records, from very short through several-centimeter bobtails to a longer tail with a kinked or bent tip; it should remain functional and painless.
Raas Cat Temperament
The best-documented Busok image is a solid blue-gray, shorthaired cat with an angular head, upright ears, firm athletic body, and a tail ending in a bend; formal standards are still evolving.
Published popular descriptions conflict on size, tail length, eye color, and whether the rare brown shade is chocolate or cinnamon, so precise claims require an IBRA or FFF registration record.
Temperament Traits
Good With
Health
No peer-reviewed clinical study establishes Raas longevity or breed-specific disease prevalence. The conservation population is small and geographically structured, while its shortened or bent tail has not been tied to a published causal variant. Claims that island purity automatically guarantees health or disease resistance are therefore unsupported.
Common Health Issues
Preventive Care
Conservation breeding should use verified pedigrees, population-genetic guidance, complete litter records, and selection for normal movement, continence, reproduction, hearing, vision, and longevity rather than color alone. Veterinarians should examine the spine, tail, hindlimbs, anus, bowel and bladder function, teeth, heart, and parasite status. Maintain vaccination, sterilize cats outside a managed program, and use locally appropriate parasite and infectious-disease prevention.
Caring for Your Raas Cat
Grooming Requirements
The short, close, smooth coat is low maintenance. Grooming is still valuable for identifying parasites, wounds, skin disease, weight change, and discomfort around the tail.
Brushing
Brush once weekly with a soft rubber mitt or natural-bristle brush, increasing during shedding, and gently inspect the spine and every tail bend without trying to straighten it.
Bathing
Bathe only when contaminated or dirty using a mild cat-safe shampoo, rinse fully, and keep the cat warm until dry.
Eye Care
Wipe minor discharge with a separate soft damp cloth for each eye; persistent pain, redness, cloudiness, or colored discharge needs veterinary assessment.
Nail Care
Every 2-3 weeks for indoor cats, adjusted for natural wear.
Essential Grooming Tools
Exercise & Play
Available descriptions portray an athletic, alert island cat, but no formal behavioral study supports a fixed activity profile. Enrichment should follow the actual individual's confidence, history, and health.
Daily Requirements
Provide approximately 40-60 minutes of interactive play in several sessions, plus climbing, scratching, hiding, running routes, and safe opportunities to investigate scent and food puzzles.
Mental Stimulation
Rotate prey-like toys and scent objects, scatter part of the measured ration, provide elevated observation, and socialize gradually without forcing a landrace cat that is cautious around unfamiliar people.
Recommended Activities
Nutrition & Feeding
There is no Raas-specific feeding evidence. Use a complete-and-balanced diet appropriate to life stage rather than romanticizing an island scavenging diet or feeding raw prey without nutritional and pathogen controls.
Daily Amount
Start with the manufacturer's guide, measure all food and rewards, divide the ration into at least two meals and enrichment, and adjust with a veterinarian using rib cover, waist, muscle, growth, age, reproductive status, and activity.
Special Considerations
Provide clean fresh water and an appropriate wet-food component. Community cats need coordinated feeding that does not promote uncontrolled population growth, and sick individuals require diagnosis-specific veterinary nutrition.
Living Environment
Space Requirements
A secure indoor home or spacious enclosed catio should provide vertical routes, scratching surfaces, hiding places, clean litter boxes, and room for athletic movement while preventing escape and uncontrolled breeding.
Climate Preferences
The landrace developed in a tropical maritime climate, but individual heat, humidity, rain, and cold tolerance has not been studied. Always provide shade, ventilation, water, dry shelter, and temperature-controlled refuge.
Ideal Lifestyle Match
Best suited to patient, experienced caretakers who respect cautious behavior and conservation restrictions. It should not be purchased as an exotic novelty or removed from local programs through undocumented trade.
Colors & Patterns
Solid blue-gray defines the Busok form. Developing standards also list black, chocolate, and lilac; informal sources sometimes call the rare brown form cinnamon or Amethyst, making a registered color code preferable to a translated nickname.
Solid Colors
Patterns
Eye Colors
Not reliably standardized across accessible authoritative descriptions; should be recorded from the applicable IBRA or FFF standard
Fun Facts About Raas Cat
Raas Island lies in Sumenep Regency in Indonesia's East Java province.
Busok is the best-known name for the solid blue-gray form.
The cats have cultural importance as prestigious gifts in local history.
Stories that removing an intact cat brings misfortune are folklore, not biological evidence.
IBRA coordinates current Indonesian conservation and standardization work.
The Feline Fanciers Federation lists Busok in a provisional class.
A current public WCF breed-standard list does not include Raas or Busok despite reports of a 2022 acknowledgment.
No reliable study yet establishes breed lifespan or inherited-disease prevalence.
Training Tips
Frequently Asked Questions
Are Raas, Busok, and Madura cat the same?
The names overlap. Raas refers to the island landrace; Busok most specifically describes the prized blue-gray form, while Madura cat is a broader geographic name. Developing clubs may apply the terms more formally.
Is the Raas recognized by major registries?
IBRA maintains a developing standard and the Feline Fanciers Federation lists Busok provisionally. Indonesian reports describe a WCF acknowledgment in 2022, but the current public WCF shorthair standards do not list a Raas or Busok breed standard, so the exact status should not be overstated.
Can a solid blue Indonesian cat be identified as Raas?
No. Blue is a common dilution color. Geographic origin, documented ancestry, conservation registration, and the developing whole standard are needed; color or a photo alone cannot establish landrace identity.
Specialized Care Guides
Kitten Care
Verify lawful conservation-program provenance, obtain complete veterinary infectious-disease and parasite assessment, inspect the spine and tail, provide complete kitten nutrition, and socialize gently to handling, carrier, indoor life, grooming, and varied people without flooding.
Senior Care
No Raas-specific aging data exist. Arrange checks every 6-12 months as advised for teeth, kidneys, thyroid, heart, blood pressure, weight, muscle, spine, tail, continence, senses, and mobility, adapting access and climate to the individual.
First-Time Owner Tips
Not a sensible novelty purchase for most first-time owners. The population is a conservation concern with uncertain health data and availability; support Indonesian preservation and choose an established, behaviorally compatible local cat instead.
Looking for a Raas Cat?
Connect with responsible breeders, rescue organizations, and pet adoption services in your area.