Toy group · Small · United Kingdom
Cavalier King Charles Spaniel
Also known as: Cavalier, CKCS
The Cavalier King Charles Spaniel is arguably the best pure companion dog ever made: gentle with everyone, adaptable to any lifestyle, and pathologically affectionate. The honest headline is heartbreak — mitral valve disease runs through the breed at devastating rates, so choosing a breeder who does cardiologist screening is the single most important decision you'll make.
Height
12-13 in
Weight
13-18 lbs
Lifespan
12-15 years
Coat
Silky, medium-length coat with feathering
Exercise
45+ min/day
Puppy price
$1,800-$3,500
AKC popularity
#12
Best for
Anyone — first-timers, families, retirees — who wants the sweetest lap dog in the AKC and is prepared to vet breeders hard for heart health.
Trait Scores
What owners love
- +The temperament is the whole package: sweet with kids, seniors, dogs, cats, strangers — the breed basically has no enemies
- +An exercise chameleon — happy to hike five miles with you or nap through a rainy Sunday, matching your energy
- +Eager to please and soft-natured, making training genuinely easy for first-time owners
- +Small enough for any apartment but not yappy, fragile, or trembly like many toy breeds
- +A natural therapy dog; Cavaliers read human emotion better than most breeds
- +Travel-friendly size and a silky coat that needs brushing but no expensive haircuts
What owners warn about
- −Mitral valve disease is the breed's tragedy — it's extremely widespread with age, and cardiologist-screened parents only improve the odds, not eliminate them
- −Syringomyelia (a painful neurological condition tied to skull shape) also runs in the breed and is expensive to diagnose and manage
- −Velcro to a fault: Cavaliers do poorly left alone all day and separation anxiety is common
- −Those gorgeous ears trap moisture and grow infections without regular cleaning
- −Bottomless appetite plus sad spaniel eyes equals obesity in a huge share of pet Cavaliers
- −The soft temperament that makes them easy also makes them useless watchdogs and easy targets for rough handling
Common Health Issues
Frequently Asked Questions
How serious is heart disease in Cavaliers?+
It's the defining health issue of the breed — mitral valve disease shows up earlier and far more often in Cavaliers than in almost any other breed, and it's the leading cause of death. Buy only from breeders who screen breeding dogs with a board-certified cardiologist (not just a vet listen) and follow protocols on breeding age. Budget for annual heart checks from middle age onward.
Are Cavaliers good for first-time dog owners?+
One of the best choices there is. They're forgiving, gentle, easy to train, and adaptable to apartments or houses. The two things first-timers underestimate: they genuinely cannot be an 8-hours-alone-every-day dog, and cheap 'Cavalier' puppies from unscreened parents are how you end up with a heart patient at age six.
How much exercise does a Cavalier need?+
A moderate daily walk and some play — about 45 minutes total — keeps them fit, but the breed's superpower is flexibility. They'll happily do more with active owners and less with homebodies. The real discipline is food: keep them lean, because obesity is rampant and makes the heart issues worse.
Do Cavaliers bark a lot?+
No — they're one of the quieter small breeds, which combined with their size makes them superb apartment dogs. Most will announce a doorbell and then escort the intruder to the treat jar. If you want a watchdog, look elsewhere.