Cavalier King Charles Spaniel Health Problems

There is no kinder lap-dog than a Cavalier King Charles Spaniel, and no breed asks more of an owner who wants to do right by it. Cavaliers are one of the most affectionate dogs you can own, but they also carry some of the best-documented inherited health problems in pedigree dogs. None of this is meant to put you off the breed. It is meant to help you buy carefully, care well, and know what to watch for. This is general information, not veterinary advice, so always speak to your own vet about your dog.

Mitral valve disease (MVD): the big one

Mitral valve disease is the most important health problem in the breed, and the leading cause of death. It is a degeneration of one of the heart's valves, which gradually leaks and forces the heart to work harder. In Cavaliers it appears far earlier and far more often than in most breeds. Vets typically first detect it as a heart murmur. Roughly half of all Cavaliers have a murmur by around five years of age, and by ten years nearly all do. UK primary-care data from the RVC's VetCompass project found cardiac disorders to be the single most common type of problem in the breed, and MVD accounts for a very large share of Cavalier deaths.

The encouraging news is that MVD can be managed. Early-stage disease often needs only monitoring, and there is now good evidence that the right heart medication, started at the correct stage, can delay the onset of heart failure. That is why regular cardiac checks matter as your dog ages.

For breeding, the UK has the Kennel Club / Veterinary Cardiovascular Society Heart Scheme, in which approved cardiologists grade dogs by auscultation (and sometimes echocardiography). Dogs are recommended for assessment at two, four and six years. Responsible breeders follow the long-standing MVD protocol: breed only from dogs over a sensible age that are clear of a relevant murmur, ideally with older parents also clear. Ask any breeder for heart-scheme results, not just a verbal "the parents are fine".

Syringomyelia and Chiari-like malformation (CM/SM)

The breed's second major concern is neurological. Chiari-like malformation means the skull is too small for the brain, and is now so widespread it is considered almost universal in the breed. In some dogs this disrupts the flow of cerebrospinal fluid and causes syringomyelia, where fluid-filled cavities form within the spinal cord. SM can be painful and progressive. Classic signs include scratching at the air near the neck or shoulder (often without making contact), sensitivity around the head and neck, yelping for no obvious reason, and a reluctance to be touched in certain places.

Diagnosis is by MRI scan, and the UK has a formal BVA/Kennel Club CM/SM screening scheme that grades dogs from their scans. A single scheme submission costs around £100, on top of the vet and MRI scan fees. Breeders following best practice MRI-screen their breeding dogs and follow the published SM breeding protocol, taking the age at scanning into account. Not every affected dog shows signs, and many live comfortably, but it is a condition to take seriously and to ask about.

Episodic falling, eyes, ears and joints

Episodic falling syndrome causes sudden episodes of muscle stiffness and collapse, usually triggered by exercise or excitement. Crucially, there is a definitive DNA test, as there is for the combined dry eye / curly coat (CKCSID) condition. No Cavalier should be born affected by either, so a reputable breeder will show you DNA results for both.

Eyes are another watch-point. Cavaliers have a notably high risk of dry eye (keratoconjunctivitis sicca), and the breed is also predisposed to hereditary cataracts and retinal dysplasia. Eye testing of breeding dogs is recommended.

The breed is also prone to luxating patella (slipping kneecaps), thought to affect a meaningful proportion of Cavaliers, and to primary secretory otitis media, or "glue ear", a build-up of thick mucus in the middle ear reported almost exclusively in this breed that can cause pain, head-shyness or balance issues. Like most small breeds, Cavaliers are also prone to dental disease, so routine tooth care matters.

Lifespan and everyday care

UK VetCompass figures put the average Cavalier lifespan at around 9.9 years, lower than many comparable small breeds, largely because of MVD. A good diet, keeping your dog lean (excess weight strains the heart), sensible exercise, dental care and regular vet checks all help your dog live well for as long as possible.

When to see your vet

Book a check if you notice any of the following: a cough (especially at night or after rest), tiring or breathlessness on walks, fainting or collapse, a swollen tummy, or a rapid resting breathing rate. For neurological problems, watch for persistent air-scratching at the neck, signs of pain when touched around the head or neck, unexplained yelping, or a wobbly, uncoordinated gait. Sudden exercise-triggered stiffness or collapse, a head tilt or balance problems, or a red, sore or gunky eye also warrant a vet visit. If your dog already has a diagnosed heart murmur, keep to the monitoring schedule your vet recommends, as catching the transition toward heart failure early makes a real difference.

The single most powerful thing a new owner can do is buy from a breeder who heart-schemes, MRI-screens and DNA-tests their dogs, and who is happy to show you the paperwork. It will not eliminate every risk, but it stacks the odds in your dog's favour.

Sources

• Royal Kennel Club / Veterinary Cardiovascular Society, Heart Scheme for Cavalier King Charles Spaniels: royalkennelclub.com
• British Veterinary Association, Chiari Malformation / Syringomyelia (CM/SM) Scheme: bva.co.uk
• RVC VetCompass, common disorders and longevity in Cavalier King Charles Spaniels (O'Neill/Summers et al.): rvc.ac.uk/vetcompass
• UFAW, Cavalier King Charles Spaniel – Mitral Valve Disease genetic welfare problems: ufaw.org.uk