Korat: the silver-blue Thai cat carried into weddings for good luck

In the National Museum in Bangkok sits the Tamra Maew, a 14th-century Thai manuscript inked onto palm leaves that catalogs seventeen kinds of cats considered auspicious in the old kingdom of Siam (modern Thailand). The Korat appears in those pages under its traditional name, Si-Sawat, which means "color of the sawat seed," a native fruit of a blue-silver hue. The text describes a cat of good fortune, given traditionally in pairs to newlyweds as a charm for prosperity and fertility.

Unlike the Siamese (also recorded in the Tamra Maew), the Korat is a natural breed kept almost pure for centuries. It saw no intense aesthetic selection until it reached the West in 1959, when American breeders imported the first specimens. Recognized by the CFA in 1966 and FIFe in 1969, it is today one of the oldest breeds preserved with its original type nearly unchanged. That narrow genetic base carries a small set of specific inherited conditions worth understanding before you adopt.

Why the Korat is associated with good luck

Because of the Tamra Maew manuscript and centuries of Thai cultural tradition. The name Si-Sawat translates literally as "sawat color" (silver-blue), and in some contexts the word "sawat" also carries a sense of prosperity. That linguistic overlap is the root of the charm.

Traditionally, Korats were given in pairs at Thai weddings to secure a family's prosperity. Breeding continued for centuries without outside crosses, which preserved both the type and the restricted gene pool.

How the Korat differs from other blue cats

This is the common question, because several breeds share a uniform blue-gray coat. The key contrasts:

Trait	Korat	Russian Blue	British Shorthair Blue	Chartreux
Origin	Thailand	Russia	United Kingdom	France
Coat	Short, no undercoat	Short, plush double coat	Short, very plush double coat	Short, dense
Body	Slender, subtly muscular	Slender, oriental	Cobby, round	Robust, cobby
Head	Heart-shaped (unique trait)	Wedge-shaped	Round with full cheeks	Trapezoidal
Eyes	Brilliant green	Emerald green	Copper/orange	Copper/gold

The Korat's heart-shaped head is its most distinguishing feature. Seen from above, the skull forms a perfect heart thanks to the rounded cheeks and the narrow muzzle.

What the Korat's temperament is actually like

Four traits define it:

Selective, deep attachment. It bonds intensely with its person or core family. With strangers it stays reserved, watching before it approaches. It isn't aggressive, simply cautious.

Sustained medium-high energy. It plays actively with its family, chases toys, and leaps to high perches. It keeps that activity well into late adulthood.

Notable intelligence and memory. It remembers routines precisely, learns to open things, and manipulates objects. Some individuals learn clicker tricks.

Moderate, musical voice. It meows less than a Siamese but more than a Persian, in soft tones rather than shrill ones. Its purr is remarkably loud for the size of the cat.

It pairs well with quiet homes, couples, and families with older children. It is not the best choice for environments with many visitors or frequent change.

What hereditary health issues the Korat has

The breed has a relatively clean clinical profile outside two specific pathologies:

GM1 gangliosidosis. An autosomal recessive lysosomal neurodegenerative disease. Homozygous kittens develop progressive neurological signs from around 2 to 3 months of age, with death typically before their first birthday. A genetic test has been available since 2007. Serious breeders test as a matter of course.

GM2 gangliosidosis. A variant similar to GM1 but genetically distinct. A genetic test is available. Same fatal clinical profile in homozygous kittens.

These two genetic tests are essential for any responsible Korat breeder. Buying from a breeder without them is a real gamble: both conditions are fatal and both can be avoided entirely with preventive screening.

Beyond these two specific genetic conditions, the Korat has a robust health profile. Documented average life expectancy runs around 15 to 20 years, among the longest of any cat breed.

How much grooming does the Korat need

Minimal. The coat is short, silky, and carries little to no undercoat (unlike the Russian Blue, which has a double coat). A reasonable routine:

Weekly brushing with a soft-bristle brush or a rubber grooming mitt.
No bathing except in emergencies.
Moderate dental care.

The Korat's coat is largely self-regulating and very easy to maintain. It is also one of the lowest-shedding breeds in the registry.

How much should a Korat eat

A healthy 8-pound (3.5 kg) adult needs roughly 1.5 to 2 oz (40-55 g) of premium dry food per day, split into two meals. High animal protein, with no special requirements. As with any cat, keep an eye on weight in spayed and neutered adults and adjust the ration.

Does it adapt well to apartment life

Yes, perfectly. It is an ideal quiet-apartment breed. What it asks for:

Moderate climbing space: a medium-height cat tree and a few shelves.
Daily play, 20 to 30 minutes.
A predictable home: the Korat values routine, and abrupt change produces stress.
Human company for much of the day, or a second sociable cat.

How much does a Korat cost in the United States

The breed is quite uncommon in the U.S. A kitten with CFA or TICA pedigree and tested parents (GM1 and GM2) costs between $1,200 and $2,500 in 2026, frequently from imported lines. Availability is limited, and a months-long waitlist is common. Avoid any "deal" that skips the genetic testing: the up-front saving can translate into a fatal lysosomal disease.

Does it get along with other animals

Medium-high tolerance. It accepts living with:

Other cats that are sociable, after a gradual introduction.
Calm dogs, with care during the introduction.
Children over 6 or 7 who respect its space.

It does best in homes with few changes and little stranger traffic.

Korat data sheet

Identification

Size: small to medium
Weight: 6-10 lb (2.5-4.5 kg) males; 4.5-8 lb (2-3.5 kg) females
Life expectancy: 15-20 years
Origin: Thailand (Korat province), a natural breed documented since the 14th century

Physical

Coat: short, silky, no undercoat
Color: uniform silver-blue with silver-tipped guard hairs (the "silvering" effect)
Eyes: intense brilliant green in adults (kittens have blue or amber eyes that change with age)
Head: heart-shaped seen from above
Body: slender yet subtly muscular

Temperament

Sociability: high with family, moderate with strangers
Independence: medium
Vocalization: moderate and musical
Trainability: high

Care

Brushing: weekly, light
Exercise: daily play and some vertical space
Diet: premium high-protein food, ration adjusted

Frequently asked questions

How is it different from the Russian Blue? Korat: heart-shaped head, no undercoat, Thai origin. Russian Blue: wedge-shaped head, plush double coat, Russian origin.

Is it really a good-luck cat? It's a Thai cultural tradition documented since the 14th century. There's no scientific basis to it, but it's a genuine part of the breed's heritage.

Is it hypoallergenic? Not strictly, though the low coat density and absence of an undercoat can make it easier to tolerate for some people with mild allergies.

Does it get along with dogs? With calm dogs, yes. It needs a gradual introduction and a predictable environment.

How long does it live? 15 to 20 years, one of the longest-lived cat breeds.

Does it shed a lot? Very little. It's one of the lowest-shedding breeds in the registry.

Bibliography

The Cat Fanciers' Association (CFA), Official Breed Standard: Korat. https://cfa.org
The International Cat Association (TICA), Korat judging criteria and registry. https://tica.org
Tamra Maew (Treatise on Cats), 14th-century Thai manuscript, National Museum Bangkok.
University of California Davis, Veterinary Genetics Laboratory, GM1 and GM2 gangliosidosis tests in the Korat. https://vgl.ucdavis.edu
American Veterinary Medical Association, clinical resources on feline lysosomal storage disease.