Cavalier King Charles Spaniel health problems are among the most serious of any breed in the UK. Despite being one of the most popular companion breeds, consistently ranking in the Kennel Club’s top 20 registrations, Cavaliers are genetically predisposed to several significant conditions that every owner must understand.
If you own a Cavalier or are considering getting one, understanding these health risks is not optional. It is the single most important responsibility you take on. This guide covers the major health conditions affecting Cavaliers in the UK, typical symptoms, what treatment looks like, what it costs at UK veterinary practices, and what you can do to give your dog the best chance of a long and comfortable life.
Common Cavalier King Charles Spaniel Health Problems: Mitral Valve Disease (MVD)
Mitral valve disease is the most significant health concern in Cavalier King Charles Spaniels. It is not a risk. It is a near-certainty. Research published in the Journal of Veterinary Internal Medicine indicates that by the age of 10, virtually all Cavaliers will have developed some degree of mitral valve degeneration. Many develop it much earlier, with murmurs detectable from the age of 3–5 in a substantial proportion of the breed.
The mitral valve sits between the left atrium and left ventricle of the heart. When it degenerates, it fails to close properly, allowing blood to leak backwards with each heartbeat. Over time, this causes the heart to enlarge as it works harder to compensate. Eventually, the heart can no longer cope, leading to congestive heart failure.
Symptoms to Watch For
- A persistent cough, particularly at night or after exercise
- Rapid or laboured breathing, even at rest
- Reluctance to exercise or tiring more quickly than usual
- Fainting or collapsing episodes
- A distended abdomen (fluid accumulation)
- Restlessness at night, difficulty settling
Diagnosis and UK Vet Costs
Your vet will typically detect a heart murmur during a routine examination using a stethoscope. Murmurs are graded from 1 (barely audible) to 6 (loud, with a palpable thrill). A murmur alone does not mean your dog is in heart failure, but it does mean monitoring is required.
For a definitive assessment, your vet will refer you for an echocardiogram (heart ultrasound), usually performed by a veterinary cardiologist. In the UK, an echocardiogram typically costs between £300 and £500. Follow-up echocardiograms are usually recommended every 6–12 months depending on progression.
Once congestive heart failure develops, treatment involves daily medication, typically a combination of pimobendan, furosemide, and an ACE inhibitor. Monthly medication costs for a Cavalier in heart failure in the UK typically run between £50 and £120, depending on the combination and dose.
What You Can Do
Request an annual cardiac check from your vet, including auscultation (stethoscope examination). If a murmur is detected, discuss referral for an echocardiogram. If you are buying a Cavalier puppy, insist on seeing cardiac certificates for both parents, ideally tested under the Kennel Club/BVA heart scheme. Breeders who refuse or cannot provide these certificates should be avoided.
Early detection and medication can significantly extend quality of life. A Cavalier diagnosed with MVD and started on appropriate medication at the right stage can live comfortably for several years beyond diagnosis. The key is not to wait for symptoms, by the time symptoms are visible, significant cardiac remodelling has already occurred.
Syringomyelia (SM) and Chiari-Like Malformation (CM)
Syringomyelia is a devastating neurological condition that is disproportionately common in Cavaliers. It is caused by Chiari-like malformation, a structural defect in which the back of the skull is too small for the brain, forcing part of the cerebellum through the opening at the base of the skull. This obstructs the normal flow of cerebrospinal fluid, causing fluid-filled cavities (syringes) to form within the spinal cord.
Research from the Royal Veterinary College and other institutions has found that a very high proportion of Cavaliers have some degree of Chiari-like malformation, though not all develop symptomatic syringomyelia. Estimates vary, but studies using MRI screening have found CM present in a significant majority of the breed. In 2025, the Kennel Club launched a new five-year research project specifically aimed at improving understanding and reducing the prevalence of syringomyelia in the breed, working alongside the BVA/KC CM/SM scheme.
Symptoms to Watch For
- Scratching at the neck, ear, or shoulder area, often without making contact with the skin (“phantom scratching” or “air scratching”) — this is the hallmark sign
- Yelping or crying out for no apparent reason, particularly when excited or being picked up
- Sensitivity around the head, neck, or shoulders
- Reluctance to be touched or groomed around the head
- Weakness or wobbliness in the limbs (in severe cases)
- Behavioural changes: increased irritability, withdrawal, or disrupted sleep
Diagnosis and UK Vet Costs
Definitive diagnosis requires an MRI scan, which in the UK costs between £1,500 and £3,000 depending on the clinic and whether sedation or general anaesthesia is required. This is typically performed at a specialist veterinary neurology referral centre.
Treatment options range from pain management (gabapentin, pregabalin, and anti-inflammatory drugs) to surgical intervention in severe cases. Surgery, when indicated, involves a procedure similar to decompression surgery in humans and can cost £5,000–10,000 or more at specialist centres. It does not cure the condition but can significantly reduce pain and improve quality of life.
Ongoing pain medication for a Cavalier with symptomatic SM typically costs £40–£100 per month in the UK.
What You Can Do
If you notice phantom scratching in your Cavalier, do not dismiss it. Record video of the behaviour and show it to your vet. Request referral to a veterinary neurologist. Early pain management makes a substantial difference to quality of life.
If buying a puppy, look for breeders who MRI scan their breeding stock under the BVA/KC CM/SM scheme. MRI-screened parents with low grades are less likely (though not guaranteed) to produce severely affected offspring. This is one of the most important health tests for this breed.
Ear Infections and Deafness
Cavaliers’ long, floppy ears create a warm, enclosed environment that is ideal for bacterial and yeast infections. Chronic ear infections (otitis externa) are extremely common in the breed. Left untreated, repeated infections can lead to otitis media (middle ear infection), which can cause pain, head tilting, loss of balance, and in severe cases, permanent hearing impairment.
Prevention and Treatment
- Check your Cavalier’s ears weekly for redness, odour, discharge, or excessive wax buildup
- Clean ears regularly using a vet-recommended ear cleaner (typically £8–£15 per bottle)
- Keep ears dry after swimming or bathing
- A vet consultation for an ear infection in the UK typically costs £40–£60, plus £15–£30 for prescribed ear drops or antibiotics
If your Cavalier is shaking their head frequently, scratching at their ears, or you notice a smell, see your vet promptly. Chronic infections that are repeatedly treated with antibiotics without addressing the underlying cause can lead to resistant bacteria and more complex treatment needs.
Eye Conditions
Cavaliers are predisposed to several eye conditions, the most common of which are dry eye (keratoconjunctivitis sicca), cataracts, and corneal ulcers. Dry eye occurs when the tear glands do not produce sufficient tears, leading to irritation, discharge, and potentially corneal damage if untreated.
Eye drops for dry eye (typically cyclosporine-based) cost approximately £30–£60 per month in the UK and are a lifelong commitment once diagnosed. Annual eye examinations under the BVA/KC eye scheme are recommended for breeding dogs and are advisable for all Cavaliers.
Breed-Specific DNA Tests: CC/DE and Episodic Falling
In addition to the cardiac, neurological, and eye screening discussed above, there are two breed-specific DNA tests that responsible Cavalier breeders in the UK should carry out. Both are simple saliva or blood tests that identify whether a dog carries, is affected by, or is clear of the relevant genetic mutation.
Curly Coat / Dry Eye Syndrome (CC/DE)
Curly coat / dry eye syndrome is a condition unique to Cavalier King Charles Spaniels. Affected puppies develop an abnormally rough, curly coat and severely dry eyes from a young age, often leading to painful corneal damage. The condition is caused by a recessive gene mutation, meaning a puppy must inherit the faulty gene from both parents to be affected.
A [CC/DE DNA test] identifies whether a breeding dog is clear, a carrier, or affected. Breeding two carriers together produces a 25% chance of affected puppies. Responsible breeders should test both parents and never mate two carriers. This test is inexpensive (typically £40–£70) and widely available through the Kennel Club’s approved laboratories.
Episodic Falling Syndrome (EF)
Episodic falling is a neurological condition that causes episodes of muscle stiffness and collapse, typically triggered by exercise, excitement, or stress. During an episode, the dog may appear to freeze, stiffen, or fall over. Episodes can look alarming but the dog usually recovers within minutes. The condition is sometimes misdiagnosed as epilepsy.
Like CC/DE, episodic falling is caused by a recessive gene mutation. An [EF DNA test] identifies carrier status. Both parents should be tested, and two carriers should never be bred together. The test is widely available and costs approximately £40–£70.
If you are buying a Cavalier puppy in the UK, ask the breeder for both CC/DE and EF DNA test results for both parents alongside cardiac screening and any CM/SM or eye-testing information they can provide. No test guarantees a perfect outcome, but good screening and transparent records significantly reduce avoidable risk.
Obesity and Joint Issues
Cavaliers love food and are prone to weight gain if their diet is not carefully managed. Obesity worsens heart disease, puts additional strain on joints, and reduces overall quality of life. Patellar luxation (slipping kneecap) is also seen in the breed, particularly in overweight individuals.
Maintain your Cavalier at a healthy weight by feeding a measured, appropriate diet and providing regular gentle exercise. Your vet should be able to feel your dog’s ribs without pressing hard. If they cannot, your dog is overweight.
Pet Insurance for Cavaliers in the UK
Given the breed’s extensive health profile, lifetime pet insurance is strongly recommended. Cavaliers are among the most expensive breeds to insure in the UK due to their known predispositions. Expect to pay between £40 and £80 per month for a comprehensive lifetime policy, depending on your location, the dog’s age, and the level of cover.
Do not choose time-limited or maximum benefit policies for this breed. MVD and SM are chronic, progressive conditions that require years of treatment. A time-limited policy that caps cover at 12 months per condition will leave you paying out of pocket for the most expensive phases of treatment.
When comparing policies, read the small print carefully. Check whether bilateral conditions are excluded, what the age-related co-payment structure looks like (many policies introduce a 10–20% co-payment for dogs over 8), and whether the annual benefit limit is sufficient to cover specialist referral plus ongoing medication in the same policy year. For a Cavalier, a minimum annual benefit limit of £7,000–£8,000 is advisable.
What to Ask a Cavalier Breeder in the UK
If you are buying a Cavalier puppy, health paperwork matters. A responsible breeder should be prepared to discuss the health history of the parents openly and show you relevant test results. If that conversation becomes vague, evasive, or defensive, treat that as information in itself.
At minimum, ask for the following:
- Heart-screening certificates for both parents, ideally through the [Kennel Club/BVA heart scheme] or equivalent cardiology assessment. Both parents should have been tested after the age of 2.5 years.
- CC/DE DNA test results for both parents, confirming clear or carrier status. Two carriers should never be mated.
- EF DNA test results for both parents, confirming clear or carrier status.
- Any eye-testing information available for the parents under the BVA/KC eye scheme.
- Any relevant MRI or CM/SM screening history the breeder can provide, together with a discussion of symptoms and family history in previous litters.
No test guarantees a perfect outcome, but a breeder who invests in comprehensive health screening demonstrates a commitment to the breed’s welfare that directly benefits you and your puppy. A breeder who cannot or will not provide these results is a breeder to avoid.
Lifespan and Quality of Life
The average lifespan of a Cavalier King Charles Spaniel in the UK is approximately 9–12 years, though some live longer with good care and favourable genetics. The breed’s quality of life depends heavily on proactive health management: annual cardiac screening, awareness of neurological symptoms, weight management, ear care, and appropriate insurance cover.
A well-cared-for Cavalier with attentive owners who understand the breed’s vulnerabilities can live a happy, comfortable life. The key is never to assume that your dog is fine simply because they appear well. Many of the conditions described above progress silently before symptoms become obvious.
Frequently Asked Questions
What is the most common health problem in Cavalier King Charles Spaniels?
Mitral valve disease (MVD) is the most common and most serious health condition in the breed. The majority of Cavaliers will develop MVD during their lifetime, with many showing signs from middle age onwards.
How much does it cost to treat a Cavalier with heart disease in the UK?
Initial diagnosis via echocardiogram costs £300–£500. Ongoing monthly medication for congestive heart failure typically costs £50–£120 per month. Over the course of the disease, total treatment costs can run into several thousand pounds, making lifetime pet insurance essential.
What is phantom scratching in Cavaliers?
Phantom scratching is a characteristic symptom of syringomyelia. The dog scratches at their neck or shoulder area without making contact with the skin, often while walking. It is caused by abnormal nerve sensations resulting from fluid-filled cavities in the spinal cord. If you observe this behaviour, record a video, consult your vet, and request referral to a veterinary neurologist for assessment.
What DNA tests should I ask a Cavalier breeder for?
Ask for CC/DE (curly coat / dry eye syndrome) and EF (episodic falling) DNA test results for both parents. Both conditions are caused by recessive genes, meaning a puppy must inherit the mutation from both parents to be affected. A responsible breeder will have tested both parents and can show you the certificates. These tests are available through Kennel Club approved laboratories.
Should I get lifetime pet insurance for a Cavalier?
Yes. Lifetime cover is the only type of insurance appropriate for this breed. Time-limited or maximum benefit policies will not cover the ongoing treatment costs of chronic conditions like MVD and syringomyelia, which require years of management. A minimum annual benefit limit of £7,000–£8,000 is recommended.
Are Cavalier King Charles Spaniels unhealthy as a breed?
They are not doomed, but they do carry significant breed-related health risks that owners must take seriously. MVD and CM/SM are the most important concerns. With responsible breeding practices, proactive screening, early veterinary intervention, and appropriate insurance, many Cavaliers live happy, comfortable lives well into their senior years.