Cavalier King Charles Spaniels are, without question, one of the sweetest-natured dogs in existence. They are gentle, affectionate, completely non-threatening, and deeply devoted to human company. They will sit with you, sleep against you, and follow you from room to room with the quiet commitment of a very small, very soft shadow. They are also, unfortunately, a breed with a genuinely difficult health legacy that every Cavalier owner needs to understand before they fall entirely in love — which they will, immediately and completely.
3 Things Nobody Tells You About Cavaliers
- They are not outdoor adventure dogs. Cavaliers are companion dogs, bred for exactly that purpose. They enjoy walks, they like pottering around a garden, but they're happiest when physically close to their person. Long-distance hiking companions they are not — but they're exceptional at sitting on a sofa and making you feel better about your day.
- They get along with almost everyone. Cavaliers have a gentle, non-reactive temperament. They're good with children, other dogs, cats, and strangers. The breed produces remarkably few dog-aggression incidents. This temperament is one of their great gifts.
- Their ears need regular attention. Those magnificent floppy ears trap debris, moisture, and grow hair in the canal. Regular ear cleaning and ear hair management prevent chronic infections that would otherwise go unnoticed until severe.
Health Things to Actually Watch For
- Mitral Valve Disease (MVD): This is the defining health issue of the breed. MVD — a progressive heart valve degeneration — is so prevalent that nearly 100% of Cavaliers will develop it by age 10. Some much sooner. Annual cardiac auscultation from age 1, earlier if the breeder's lines have early-onset MVD. When a murmur is detected, cardiology referral and medication monitoring begin. This is not a reason not to own a Cavalier — it's a reason to be a diligent owner.
- Syringomyelia / Chiari-like malformation (SM/CM): The Cavalier skull is often too small for the brain, causing tissue to push into the spinal canal and leading to fluid-filled cavities in the spinal cord. Signs include scratching at the neck/shoulder area (often without contact), sensitivity to touch on the head or neck, and vocalisation of pain. MRI confirms diagnosis. Severity varies enormously.
- Hip dysplasia: Common. Ask breeders for hip scores.
- Eye conditions: Cataracts and retinal problems occur. Annual eye exams recommended.
Your Cavalier Care Cheat Sheet
- Annual heart checks from year one — detect murmurs early, begin monitoring with your vet.
- Clean ears weekly — floppy long-haired ears are infection-prone.
- Brush 3× weekly — the silky coat tangles, especially behind the ears and in the leg feathering.
- Watch for neck scratching, especially in the air — this can indicate SM/CM pain, not just an itch.
- Choose a vet familiar with Cavalier health — ask specifically about cardiac protocols and SM awareness.
Set up heart check reminders and your Cavalier's full health calendar on the Woofio Cavalier care page.