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Cat Breed Comparison

British Shorthair vs Russian Blue: Key Differences

British Shorthair 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

TraitBritish ShorthairRussian Blue
SizeMedium to LargeMedium
Weight9–18 lbs (4–8 kg)7–12 lbs (3–5.5 kg)
Lifespan12–17 years12–17 years
OriginUnited KingdomRussia (Arkhangelsk region)

Visual Differences

Telling a British Shorthair from a Russian Blue

British Shorthairs in the blue color (British Blue) are often confused with Russian Blues, but the differences are clear: British Shorthairs are cobby and round-faced with copper or gold eyes and a plush coat. Russian Blues are elongated, wedge-headed, green-eyed, and move with a lighter, more graceful step. The British Shorthair’s coat is dense and plush like sheepskin; the Russian Blue’s coat is plush but finer, with visible silver tipping.

British Shorthair Key Markers

  • Round head with full cheeks, short nose, and a visible stop between forehead and nose
  • Large, round copper or gold eyes (eye color depends on coat color)
  • Dense, plush double coat that stands away from the body — feels like thick velvet or wool

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

British Shorthair

  • Calm and easygoing — prefers lounging to climbing or jumping
  • Affectionate but not needy; happy to share a room without demanding lap time
  • Good with children, dogs, and other cats — rarely aggressive
  • Quiet — does not meow excessively; communicates with soft chirps and glances
  • Slow to mature — takes 3–5 years to reach full physical and emotional development

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

British Shorthair

  • Hypertrophic cardiomyopathy (HCM) — genetic heart disease; regular cardiac screening recommended for breeding cats
  • Polycystic kidney disease (PKD) — inherited from Persian outcross ancestry; DNA testing available
  • Obesity — the breed’s low-energy, easygoing nature makes weight management a priority
  • Dental disease — brachycephalic facial structure can cause crowded teeth and gum issues
  • Hemophilia B (Factor IX deficiency) — a rare bleeding disorder known in some British Shorthair lines

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 British Shorthair apart from a Russian Blue?
British Shorthairs in the blue color (British Blue) are often confused with Russian Blues, but the differences are clear: British Shorthairs are cobby and round-faced with copper or gold eyes and a plush coat. Russian Blues are elongated, wedge-headed, green-eyed, and move with a lighter, more graceful step. The British Shorthair’s coat is dense and plush like sheepskin; the Russian Blue’s coat is plush but finer, with visible silver tipping.
Are British Shorthairs hypoallergenic?
No — British Shorthairs are not hypoallergenic. They produce normal levels of the Fel d 1 allergen, and their dense double coat sheds a great deal of dander and fur. Their plush coat may feel wonderful, but it releases plenty of allergens into the home. Allergy sufferers should spend time with the breed before committing.
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

British Shorthair

A sturdy, round-faced cat with a dense plush coat and a calm, undemanding personality. The British Blue — a solid blue-gray coat with copper eyes — is the breed’s most recognized look, but British Shorthairs come in many colors and patterns.

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."