Cat Breed Comparison
Nebelung vs Russian Blue: Key Differences
Nebelung and Russian Blue are often confused. Compare their size, weight, lifespan, origin, temperament, and health — and learn how to tell them apart at a glance.
Quick Comparison
| Trait | Nebelung | Russian Blue |
|---|---|---|
| Size | Medium | Medium |
| Weight | 7–15 lbs (3.2–6.8 kg) | 7–12 lbs (3–5.5 kg) |
| Lifespan | 11–16+ years | 12–17 years |
| Origin | United States (1980s, from Russian Blue lines) | Russia (Arkhangelsk region) |
Visual Differences
Telling a Nebelung from a Russian Blue
Russian Blues share the blue color, green eyes, and reserved nature but wear a short plush double coat that stands away from the body. Nebelungs are longhaired with a flowing, silver-tipped coat and a plumed tail.
Nebelung Key Markers
- Medium-long blue coat frosted with silver tips at the ends of the hairs, giving a luminous, misty glow. It is dense, so it mats without regular combing.
- Long body and long tail with a full, thick plume that balances the frame.
- Wide-set eyes ranging from yellowish green to vivid green. The wide placement gives the face an intelligent look.
Russian Blue Key Markers
- Short, dense double coat in a clear even blue-gray — each hair has silver-tipped guard hairs that create a shimmering, iridescent effect; the coat stands away from the body (does not lie flat) and feels like thick plush velvet or silk; CFA calls it "short, dense, fine, and plush — standing up from the body"
- Wedge-shaped head with a flat skull and a long straight nose — the profile has a gentle break at eye level; the muzzle is short but the whisker pads are prominent, giving the face a distinct "smiling" expression
- Large, wide-set vivid green eyes in the shape of an almond laid on its side — kittens are born with yellow eyes that turn a distinct emerald green by 4 months old; the green is striking against the blue-gray coat
Temperament & Personality
Nebelung
- Gentle, mild-mannered, and playful with family, following owners from room to room
- Reserved with strangers and hides when visitors come
- Dislikes change and does best in a quiet, stable home
- Intelligent and observant, loves retrieving, jumping, and high perches
- Not needy, tolerates being left alone, and suits apartment living
- Fussy about food, but gains weight easily once it finds something it likes
Russian Blue
- Intelligent and observant — watches household routines and learns patterns; opens doors, turns on taps, and responds to its name
- Reserved with strangers — hides when visitors come, then emerges to inspect from a distance once the house is quiet
- Fiercely devoted to their family — follows their person, sleeps under the covers, demands head bumps and cheek rubs on their own terms
- Sensitive to change and loud environments — research places the breed among the least adaptable to multi-cat households, boarding, or renovation noise; best in calm, predictable homes
- Quiet — meows rarely and softly; communicates through body language, eye contact, and gentle head-butting
- Playful but not destructive — enjoys chasing, fetching, and puzzle feeders but will entertain itself quietly when no one is available to play
- Appreciates high perches — likes to be above the action, watching from cat trees or shelves rather than being on the floor in the middle of activity
Health Notes
Nebelung
- Bladder stones and urinary tract disease. Shared with the Russian Blue, its close relative; blood in the urine or straining to urinate means an immediate vet visit.
- Obesity and diabetes. The breed loves food and can easily become overweight, which raises diabetes risk; measure portions and keep play regular.
- Dental disease. Over half of cats over 3 have some form, and Nebelungs are no exception; brushing and annual cleanings help.
- Hypertrophic cardiomyopathy (HCM). Reported in Russian Blue lines, so annual cardiac checks make sense for breeding cats.
- Kidney disease and hyperthyroidism. Both are common in senior cats; annual bloodwork after age 7 catches them early.
Russian Blue
- Feline lower urinary tract disease (FLUTD) — Russian Blues show a higher-than-average predisposition to bladder stones and urinary tract inflammation; the breed’s calm stress-reactive nature may contribute to stress-triggered cystitis; high-moisture diet and stress management are key preventive measures
- Obesity — the breed’s moderate activity level and love of food can lead to weight gain; the fine-boned body frame makes even extra ounces noticeable on their silhouette
- Hypertrophic cardiomyopathy (HCM) — reported in the breed, though at lower incidence than in Maine Coons or Ragdolls; regular cardiac screening recommended for breeding cats
- Dental disease — narrow muzzle structure contributes to tooth crowding and gingivitis risk; regular dental care recommended
- Sensitivity to anesthesia — all svelte-type breeds with low body fat have a narrower anesthesia safety margin; discuss with a veterinarian before any surgical procedure
This information is for educational purposes only. Always consult a veterinarian for health advice specific to your cat.
Frequently Asked Questions
How can I tell a Nebelung apart from a Russian Blue?
Russian Blues share the blue color, green eyes, and reserved nature but wear a short plush double coat that stands away from the body. Nebelungs are longhaired with a flowing, silver-tipped coat and a plumed tail.
Are Nebelung cats hypoallergenic?
No — Nebelungs are not hypoallergenic. Their dense medium-long coat sheds and carries the Fel d 1 protein like any cat, and regular combing helps manage loose hair but does not remove allergens.
When do Russian Blue kittens’ eyes turn green?
Russian Blue kittens are born with yellow eyes that gradually shift to a vivid emerald green, usually by about 4 months of age. If an adult cat’s eyes are still yellow, orange, or copper, it is likely not a pure Russian Blue.
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Breed Profiles & More Comparisons
Nebelung
A longhaired blue cat with silver-tipped fur, wide-set green eyes, and a reserved, gentle manner, the Nebelung is the longhair cousin of the Russian Blue. The name comes from the German word for mist, a nod to the shimmering coat it wears.
Russian Blue
A blue-gray short-hair with a shimmering silver sheen and vivid green eyes. Russian Blues are reserved with strangers but deeply affectionate with their own people — quiet, gentle, and sensitive. The breed’s double coat stands up from the body, giving the cat a plush, velvety feel that cat breeders call "the smile under the hand."