Overweight
A Nebelung loves its food, and a slim cat can quickly get too heavy. Extra weight raises the chance of diabetes, stiff joints and heart trouble.
How it is found: No test. Weigh it now and then, give measured portions and play every day.

A blue semi-longhaired cat with a silver sheen like mist: elegant, devoted to its family and shy with strangers.
The Nebelung looks like a Russian Blue in a long, soft coat. Its coat is blue-grey, and the tips of the hairs are silver. That makes it look as if a layer of mist lies over it. Its name comes from the German word Nebel, mist. It is sweet and loyal to its own people, but needs time with strangers.
Warm and devoted to its own people, often picking one favourite.
Cuddles when it chooses to. It often does not like being picked up.
Playful, and sometimes happy to fetch.
Plays in short bursts and is calm the rest of the day.
Quiet, with a soft little voice.
Clever and happy to learn tricks.
Shy with visitors. Give it time and let it come to you.
Usually fine with calm, gentle children. A lot of noise makes it tense.
Often gets along with a calm dog that leaves it alone.
Usually gets on well with other cats.
Does not like long days alone.
A good indoor cat, as long as it has space, toys and company.
The Nebelung is a cross with a Russian Blue.
The first Nebelungs came from ordinary house cats, among them a black shorthair. A Russian Blue may join in later, to make the group of cats bigger and healthier.
A Nebelung is just a long-haired Russian Blue.
They look very alike and are related. The gene for long hair sometimes hides in Russian Blues. Still, the Nebelung is a breed of its own with its own standard, and Russian Blue breeders keep that gene out.
A Nebelung is grey.
Officially it is blue: an even medium blue right down to the skin. The silver tips of the hairs give it that misty, grey-looking sheen.
In 1984 Cora Cobb in Denver got a long-haired blue kitten, Siegfried. His mother was her black shorthair, his father a blue tom that looked like a Russian Blue. A year later came his sister Brunhilde. With help from a geneticist Cobb wrote a standard and started a new breed. In the 1990s long-haired kittens also turned out to come from Russian Blues in Russia, and those lines joined in. Then the breed came to Europe.
Siegfried is born in Denver: a long-haired blue kitten in a litter of shorthairs.
His sister Brunhilde is born, with a lighter, longer coat.
Siegfried and Brunhilde have their first litter. Cobb decides to build a breed.
The American registry TICA accepts the Nebelung as a new breed.
A Nebelung appears at a TICA show in Paris, its first time in Europe.
A Dutch breeder brings a Russian Blue, Timofeus, from Russia. He turns out to have semi-long hair.
TICA recognises the Nebelung fully: it may compete for championship titles.
More and more Nebelungs are bred in western Europe, with cats from Russia and America.
Britain's GCCF is shown Nebelungs at a special exhibition at a Russian Blue show.
Only four Nebelungs are registered in Britain. The breed is still very rare.
Long, elegant and firm, with long slim legs. Neither fine-boned nor cobby. Its coat is only fully grown at about two years old.
Cat registries write colours as an EMS code. The letter is the colour (n black, a blue, d red, f tortie), s means silver or smoke, y golden, and the numbers tell you about white (01–09), shading (11, 12), the tabby pattern (22–25) or colourpoint (33).
Blue(a)A Nebelung is always solid blue, in every registry. Black and white exist only in the shorthaired Russians. White spots are a fault. Kittens can show faint stripes, but these fade as they grow.
Siegfried and Brunhilde were named from an old German saga, also told in Wagner's operas. The name Nebelung comes from the same saga and from Nebel, mist.
That is how long it can take for a Nebelung's yellow kitten eyes to turn fully vivid green.
In the 1990s Russian Blues in Russia sometimes had long-haired kittens. So the gene for long hair was already in the breed.
That is about how many Nebelungs there were in the whole world in 1997, the founder guessed at the time.
In 2024 only four Nebelungs were registered in Britain.
There is no good research on it. Breed guides say anything from 11 to 18 years; about 13 to 16 is a fair guess, and some live longer. No inherited disease is known in the breed.
A Nebelung loves its food, and a slim cat can quickly get too heavy. Extra weight raises the chance of diabetes, stiff joints and heart trouble.
How it is found: No test. Weigh it now and then, give measured portions and play every day.
Some Nebelungs get small stones in the bladder or kidneys. The cat then pees often, with difficulty or with blood. A stone blocking the urethra is an emergency. How often it happens is not known.
How it is found: No DNA test. Drinking enough helps, and the vet can check the urine.
Comb it once or twice a week with a wide-toothed steel comb. During the spring and autumn moult, ideally every day. Its silky coat does not tangle easily.
Play with it every day and give it toys, cat furniture and room to explore, especially if it lives indoors.
Good meat-based food in measured portions: it loves to eat and easily gets too heavy. Make sure it drinks enough.
It loves routine. A lot of noise, bustle and change unsettle it. Give it plenty of time to settle into a new home.
A Nebelung is not hypoallergenic. Like every cat it makes the allergen that makes people sneeze, and its long coat holds on to hair and dander.
Checked on 21 October 2026
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