Cavalier King Charles Spaniel Guide: Temperament, Health Problems & Care

Gentle, affectionate and endlessly eager to please, the Cavalier King Charles Spaniel is one of the most loving companion dogs you can own — a silky-coated lapdog that fits into almost any household. But behind that sweet face are some serious inherited health issues every owner needs to understand and plan for. Here's an honest, practical guide to the Cavalier's temperament, common health problems, and day-to-day care.

Cavalier King Charles Spaniel at a glance

• Size: Small — 13–18 lb (6–8 kg), about 12–13 inches tall
• Lifespan: 9–14 years
• Energy: Moderate — enjoys walks and play, then loves to cuddle
• Grooming: Moderate — silky coat with feathering, plus regular ear care
• Good for: Families, seniors, apartments, first-time owners, multi-pet homes

Temperament: what Cavaliers are really like

Cavaliers are the definition of a companion dog. They're gentle, sociable and eager to please, forming intense bonds with their families and rarely happier than when curled up beside you. They're typically excellent with children, other dogs and cats, and they adapt beautifully to apartment or house living. That devotion has a flip side: they hate being left alone and can develop separation anxiety, so they suit homes where someone is around much of the day. They train easily with kind, positive methods. If you love this affectionate, people-first temperament, you'll find a similar spirit in the Shih Tzu and the sporty Cocker Spaniel.

Common Cavalier King Charles Spaniel health problems

Heart disease (mitral valve disease)

This is the breed's defining health concern. Mitral valve disease (MVD) is a degenerative heart condition that affects the majority of Cavaliers as they age, often appearing earlier than in other breeds. Choose a breeder who screens breeding stock, schedule annual vet heart checks, and watch for coughing, reduced stamina or increased panting, which can be early signs of heart trouble.

Syringomyelia (SM)

A serious neurological condition in which the skull is too small for the brain, causing fluid-filled cavities in the spinal cord. Signs include scratching at the neck/shoulder (often without contact), sensitivity around the head and yelping. Any of these deserve prompt veterinary assessment.

Ears

Long, feathered, floppy ears trap moisture and are prone to infection. Check and clean them regularly as part of grooming, and watch for head-shaking, odour or redness.

Joints and eyes

Cavaliers can be affected by hip dysplasia, patellar luxation (slipping kneecaps) and various eye conditions, as well as a rare "episodic falling" syndrome. Keeping them lean protects the joints, and any changes in vision or movement are worth a vet visit.

Caring for a Cavalier King Charles Spaniel

Exercise

A couple of gentle daily walks plus some play keeps a Cavalier fit and happy — enough to stay healthy without overtaxing the heart. Walking on a soft harness is comfortable and avoids pressure on the neck.

Diet

Keeping a Cavalier lean is one of the best things you can do for their heart and joints. Measure meals, go easy on treats, and ask your vet about the right food and portions — and any heart-supportive diet if MVD is diagnosed.

Grooming

The silky coat and feathering need brushing a few times a week to prevent mats, especially behind the ears and on the legs. A good grooming kit plus regular ear cleaning, nail trims and eye-area care keeps them comfortable and healthy.

Frequently asked questions

Are Cavalier King Charles Spaniels good pets?

For many people, absolutely — they're gentle, loving and great with kids, other pets and in apartments. The main caveat is health: choose a well-bred, heart-tested line and plan for annual heart checks.

How long do Cavalier King Charles Spaniels live?

Usually 9–14 years. Because heart health drives lifespan, keeping them lean, choosing a good breeder and keeping up annual heart checks makes a real difference.

What is the most common Cavalier health problem?

Mitral valve disease (MVD), a degenerative heart condition, is by far the most common and serious concern, affecting most Cavaliers as they age. Annual heart checks, screened breeding lines and a lean weight help manage the risk.

This guide is educational and not a substitute for professional veterinary care. Always consult your vet about your individual dog.