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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsShort answer: A Cornish Rex usually has a slim, long-legged, arched outline, a narrower egg-shaped head and a close, regular wave. A Devon Rex generally looks fuller and broader through the chest, with a shorter squarer head, lower-set ears and a looser wave. The coat difference is structural: Cornish Rex coats lack guard hairs, while Devon Rex coats retain sparse, short rexed guard hairs. Those are breed-standard tendencies, not guarantees for every individual cat. For pedigree or breed identification, documentation is more reliable than a photograph alone.
This guide explains what to look for in side-by-side pictures, how the two breeds arose separately, what their care involves and what cannot responsibly be claimed about health or allergies.
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At a glance: the practical differences
| Feature | Cornish Rex | Devon Rex |
|---|---|---|
| Coat structure | No guard hairs; short, soft fur arranged in close, orderly waves. | Sparse, short, rexed guard hairs are present; the wave is more open and billowing. |
| Head and nose | Narrower, egg-shaped head with a comparatively straight Roman-nose profile. | Shorter, squarer head with a definite nose stop, short muzzle and whisker pinch. |
| Ear placement | Very large ears set higher and more on top of the head. | Very large ears set lower and extending more to the sides. |
| Body outline | Fine-boned, long-legged, arched back and pronounced tuck-up. | Fuller body, broad chest and a sturdier, sometimes bulldog-like stance. |
| Typical coat-care notes | Little routine combing; occasional bathing and ear cleaning may be needed. Sparse fur can mean greater sensitivity to cold and sun. | Coat density varies, and some areas can look thin or “sueded.” A sparse area is not automatically a medical problem. |
| Temperament described by registries | Affectionate, active and social. | Intelligent, people-focused and affectionate. |
These descriptions come from the Cat Fanciers’ Association (CFA) comparison and the organizations’ Cornish Rex and Devon Rex breed pages. Standards describe a target type; age, grooming, sex, conditioning and individual genetics can make a cat look less extreme.
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What the coats look and feel like
Cornish Rex: a close, regular wave
The Cornish coat is made up of soft, short hairs without guard hairs. CFA describes the waves as close and regular, often compared with a fine marcel pattern. Because there is no coarse outer layer, the fur can feel exceptionally soft and lie close to the body. The wave normally follows the contours of the torso rather than forming loose, shaggy curls.
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Look at the flanks, shoulders and back in a photograph. On a Cornish Rex, the pattern should read as an even ripple instead of isolated tufts. The coat may appear thinner on the underside or in areas subject to rubbing. A kitten’s coat can also change as it matures, so a young cat may not yet show the final degree of wave.
Devon Rex: a more open, billowing wave
Devon Rex fur includes sparse, short guard hairs that are themselves rexed. CFA characterizes the resulting pattern as looser and more open than the Cornish wave. The coat may look tousled, with a soft, uneven “suede” effect rather than a uniform ripple. Some Devons have visibly sparse areas; the breed standard distinguishes ordinary variation from serious bare patches.
When comparing pictures, inspect the neck, chest and sides, where the wave may open out. Do not diagnose a skin condition from a picture. Hair loss accompanied by redness, crusting, itching or a sudden change warrants a veterinary examination, regardless of breed.
Why a short or curly coat does not mean hypoallergenic
Neither breed can be promised as safe for someone with cat allergies. TICA states on its Cornish Rex information page: “There is NO hypo-allergenic cat.” Allergic reactions are usually driven by proteins from a cat’s saliva and skin secretions, which can spread on fur and in the home even when the coat is short or sparse. Anyone with significant allergies should spend time with the individual cat and discuss practical risk reduction with a clinician; a breed label is not a guarantee.
Head shape, nose and ears: the easiest photographic clues
Cornish Rex profile
In a side view, the Cornish head is described as narrower and egg-shaped. The nose line is comparatively straight, producing the Roman-nose profile noted by CFA. The ears sit high, appearing to rise from the top of the head. From the front, the combination of a slim wedge, high ears and large eyes gives the face an elongated, refined impression.
Devon Rex profile
The Devon head is shorter and squarer. A visible nose stop interrupts the line between forehead and muzzle, and the muzzle narrows into a pronounced whisker pinch. The ears are set lower and project outward to the sides, emphasizing the wide, angular look. Prominent cheekbones can make the face appear even broader in a frontal photograph.
How to compare a picture fairly
- Choose images with similar camera distance and lighting. A wide-angle phone lens can exaggerate ears and muzzle length.
- Find one clear side profile to assess the nose line and one frontal view to assess head width and ear placement.
- Compare adult cats where possible. Kittens have immature proportions, and an adolescent coat may be in transition.
- Check whether the ears are cropped by the frame or held unusually forward or backward; posture changes their apparent position.
CFA’s comparison article and individual breed pages provide the descriptive vocabulary and reference images. A photograph can suggest type, but it cannot establish pedigree.
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The Cornish silhouette
Cornish Rex standards describe a fine, slender body with long legs, an arched back and a tucked-up abdomen. The waist can look sharply drawn behind the rib cage, while the hindquarters and long legs create a springy, athletic outline. In motion, the arch and leg length are often more apparent than when the cat is curled up.
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The Devon silhouette
Devon Rex cats are generally fuller through the torso and broad in the chest. CFA notes that the stance can look almost bulldog-like: sturdy, low-centered and powerful rather than delicate. The breed is still agile, but its proportions usually read as compact and muscular beside a Cornish Rex.
Weight, conditioning and pose can blur this distinction. A very lean Devon may look more angular, while a well-muscled Cornish can appear substantial. Use several views—standing, sitting and walking—rather than a single snapshot.
They are separate breeds, not two versions of one mutation
The breeds share a curly coat history but not the same underlying mutation. CFA records that a curly-coated male kitten named Kirlee was found in Devon, England, in 1959. Breeders initially thought he carried the Cornish Rex mutation. Test matings disproved that assumption: the two mutations were incompatible, so the lines were developed separately. CFA’s historical accounts support the conclusion that Cornish Rex and Devon Rex are distinct breeds with independent origins; they do not provide a modern molecular-gene nomenclature, so it would be inappropriate to add one here.
This history matters when reading pedigrees or speaking with a breeder. “Rex” describes a type of coat mutation, not a single breed. A cat with a curly coat and no documented ancestry cannot be assigned to Cornish or Devon solely from appearance.
Temperament: similar social needs, individual personalities
Cornish Rex
CFA and TICA describe Cornish Rex cats as affectionate, active and social. Many seek interaction, play and warm resting places. Their athletic build and curiosity make climbing, chasing toys and learning games useful outlets. These are broad breed descriptions, not a promise that every Cornish will be outgoing or constantly active.
Devon Rex
CFA characterizes the Devon Rex as intelligent, people-focused and affectionate. A Devon may follow household activity closely and show strong interest in its people. As with the Cornish, personality depends on early socialization, environment, age and the individual cat.
Neither registry description supports a reliable claim that one breed is universally friendlier, quieter or easier. Meet the individual cat, ask how it has been raised and observe how it responds to handling, novelty and other animals.
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Coat and bathing
The Cornish coat generally does not need regular combing. CFA notes that occasional bathing may be necessary because oils can build up on the skin and coat. Use a mild cat-specific product, rinse thoroughly and dry the cat in a warm, draft-free area; ask a veterinarian about frequency if the skin is irritated or unusually oily.
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Devon coats vary more visibly in density. A soft brush or grooming glove can remove loose hair, but aggressive brushing can damage fragile rexed fur. A thin-looking patch is not automatically abnormal for this breed. New, expanding or inflamed areas should be assessed by a veterinarian rather than treated as a grooming issue.
Ears, nails and skin
Both breeds have large ears that can accumulate wax. CFA specifically mentions ear care for Cornish Rex cats. Check the outer ear regularly and use only a veterinary-approved cleaner; never push cotton swabs into the canal. Trim nails as needed and provide a sturdy, tall scratching post. TICA recommends a “nice tall scratching pole” to support normal scratching behavior.
Temperature and sunlight
Without guard hairs, a Cornish Rex has less insulation and less natural sun protection. CFA warns that the breed can chill in cold weather and be vulnerable to sun exposure. Provide warm sleeping areas, keep the cat away from prolonged direct sun and ask a veterinarian before applying any sunscreen product. Do not assume that a Devon’s sparse-looking coat has identical protection; evaluate that individual cat’s density and environment.
Weight and routine veterinary care
TICA’s Cornish Rex guidance discusses monitoring weight, skin, ears and nails and maintaining routine veterinary care. Those are sensible practices for either breed. The sources reviewed do not establish comparable disease-prevalence data, so they cannot support a ranking that one breed is healthier overall. A veterinarian should evaluate symptoms, perform preventive examinations and tailor diet and care to the individual cat.
How to use pictures without over-identifying a cat
A useful side-by-side image set shows each cat in similar lighting, with a full-body standing view, a frontal head view and a side profile. Use the following checklist:
- Coat: Is the wave close and regular (Cornish tendency) or open and billowing with possible sparse areas (Devon tendency)?
- Ears: Do they sit high on the head or lower and farther to the sides?
- Nose: Is the profile relatively straight, or is there a clear stop and short muzzle?
- Chest and back: Does the body look fine and arched, or fuller and broad-chested?
- Context: Could age, grooming, wet fur, lighting or posture be changing the appearance?
These observations can help you ask better questions, but they are not a pedigree test. If breed identity affects a purchase, registration, showing eligibility or an adoption decision, request verifiable lineage or registration records and have a qualified professional assess the cat.
Questions to ask when meeting a Cornish or Devon Rex
Start with the cat’s records rather than its appearance. Ask to see registration or pedigree documentation if a specific breed matters to you, and confirm that the name on the paperwork matches the cat. A breeder or rescue should be willing to explain the cat’s age, socialization, diet, veterinary history and any observed skin or coat changes. Those details are more useful than a claim that a particularly tight curl proves Cornish ancestry or that a thin Devon patch proves illness.
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Ask to see the cat in ordinary light and, if possible, standing and walking. A wet coat, freshly groomed fur or a dramatic pose can hide the actual wave and body outline. Observe how the cat reacts to handling, household sounds and other animals. Registry descriptions identify tendencies, not a guaranteed temperament, so the individual interaction is important.
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If you live in a cold climate, ask how the cat is kept warm and whether it seeks heated beds or blankets. For a Cornish Rex, discuss the sparse coat’s cold and sun sensitivity and the routine for bathing and ear checks. For a Devon Rex, ask whether the coat has always been uneven or whether a sparse area appeared recently. Sudden change, irritation, itching or crusting belongs in a veterinary conversation.
A simple first-week care checklist
- Set up temperature control: Provide a warm sleeping place, especially for a sparsely coated Cornish Rex, and prevent prolonged direct sun.
- Plan gentle grooming: Do not automatically comb every day. Follow the cat’s coat condition, use light handling and bathe only when needed or when your veterinarian advises it.
- Check ears and nails: Inspect large ears for excess wax and use an approved cleaner only as directed. Keep nails trimmed and offer a tall, stable scratching post.
- Track the skin and coat: Note the normal pattern of waves and any naturally thin or “sueded” areas. Photographing the baseline can help you notice a real change.
- Schedule preventive care: Arrange routine veterinary examinations, discuss weight and diet, and report new hair loss, redness, odor, sores or persistent itching.
- Provide daily activity: Both breeds are described as social and active or people-focused. Include interactive play, climbing opportunities and regular human contact.
This checklist is ordinary cat care adapted to the traits the registries describe; it is not a substitute for individualized veterinary advice.
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Consider a Cornish Rex if you prefer
- A slender, long-legged silhouette and strongly arched back.
- A close, even wave rather than a loose, tousled texture.
- A cat that may need extra protection from cold and direct sun because of its sparse coat structure.
- An active, social companion and you can provide climbing, play and interaction.
Consider a Devon Rex if you prefer
- A fuller body, broad chest and compact, sturdy stance.
- A shorter, squarer head with lower-set ears and a noticeable nose stop.
- A softer, more open coat pattern whose density may vary across the body.
- An intelligent, people-oriented companion and you can provide daily engagement.
These are preference cues, not guarantees. Spend time with the actual cat, ask about its health history and socialization, and plan for normal veterinary costs before committing.
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Common mistakes to avoid
- Calling either breed hypoallergenic: TICA explicitly rejects that claim.
- Identifying pedigree from a curl alone: Many cats can have unusual coats, and the two Rex breeds have different mutations.
- Calling every thin Devon patch a disease: CFA allows for sparse or “sueded” areas; symptoms and change over time matter.
- Declaring a health winner: The available official pages do not provide equivalent prevalence data for both breeds.
- Comparing photos taken under different conditions: Lens distortion, lighting, wet fur and posture can create false differences.
- Over-grooming: Rex fur is delicate; use gentle handling and veterinary advice for skin problems.
Frequently asked questions
What is the clearest difference between a Cornish Rex and a Devon Rex?
Coat structure is the strongest clue. Cornish Rex coats lack guard hairs and form a close, regular wave. Devon Rex coats retain sparse, short rexed guard hairs and usually show a looser, more open wave. Head and body shape reinforce the distinction: Cornish cats tend to be narrow, arched and long-legged, while Devons tend to be fuller and broad-chested.
Can a photograph tell me which breed a cat is?
A well-lit photograph can show likely type, especially the wave, ear placement, nose profile and silhouette. It cannot prove pedigree. Grooming, age, coat density, camera angle and posture can all mislead. Use registration or pedigree records when breed identity has practical consequences.
Are Cornish Rex and Devon Rex related?
They share a history of naturally curly coats, but CFA’s account says test breeding showed that the Devon foundation cat Kirlee did not carry the Cornish mutation. The mutations were incompatible and the breeds were developed separately.
Which breed is more hypoallergenic?
Neither can be guaranteed hypoallergenic. TICA states that there is no hypoallergenic cat. A person with allergies should meet the individual cat, assess their reaction and seek medical advice rather than rely on a breed label.
Is a bald or thin patch on a Devon Rex normal?
CFA allows for variation in Devon coat density, including sparse or “sueded” areas, so a thin-looking patch is not automatically disease. A new, enlarging, irritated or itchy area should be examined by a veterinarian.
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Does the Cornish Rex need more grooming than the Devon Rex?
The sources do not establish a precise ranking. CFA says Cornish Rex generally need little routine combing but may need occasional bathing and ear care. Devon coat density varies, and gentle grooming may help remove loose hair. In either breed, avoid aggressive brushing and seek advice for skin changes.
Which breed is healthier overall?
No responsible overall winner can be named from the official descriptions. TICA discusses possible Cornish Rex care and health concerns, while CFA describes the Cornish as vigorous; equivalent prevalence data for both breeds are not provided. Preventive examinations and an individual cat’s history matter more than a broad ranking.
Sources for breed descriptions and further reading
The CFA Cornish Rex profile, CFA Devon Rex profile and CFA’s Cornish-versus-Devon comparison explain the standards, coat structure and history. TICA’s Cornish Rex page covers care considerations and the fact that no cat is hypoallergenic. Use these references to compare official descriptions, then rely on veterinary and pedigree professionals for decisions about an individual animal.
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What is the clearest difference between a Cornish Rex and a Devon Rex?
The Cornish Rex has no guard hairs and a close, regular wave; the Devon Rex has sparse, short rexed guard hairs and a looser, more open wave. Their head and body profiles differ too.
Can a photograph prove a cat’s breed?
No. Photos can suggest type, but age, grooming, lighting, posture and individual variation can mislead. Pedigree or registration documentation is more reliable.
Are either breed hypoallergenic?
No breed can be guaranteed hypoallergenic. TICA states that there is no hypoallergenic cat, so allergy sufferers should meet the individual cat and seek medical advice.
Is sparse Devon Rex fur automatically a health problem?
No. CFA allows naturally sparse or “sueded” areas. New, expanding, itchy, red or crusted patches should be evaluated by a veterinarian.
Which breed is healthier?
The cited official pages do not provide comparable prevalence data, so they do not support naming one breed healthier overall.
The Bottom Line
Cornish Rex and Devon Rex are distinct breeds. Look for the Cornish’s hairless-of-guard-hairs, close wave, narrow Roman-nose head and arched long-legged body; contrast them with the Devon’s sparse rexed guard hairs, open wave, squarer head, lower-set ears and broader chest. Treat these as tendencies, not guarantees. Use comparable photos for visual clues, but rely on pedigree records and veterinary guidance for decisions about an individual cat.
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