Boston Terrier vs Cavalier King Charles Spaniel

Side-by-side comparison of two popular breeds β€” temperament, exercise, grooming, lifespan and common health issues. Use it to decide which breed fits your home.

🐢 Boston Terrier πŸ• Cavalier King Charles Spaniel
Group Non-Sporting Toy
Origin United States United Kingdom
Weight 5–11 kg 5.5–8 kg
Height 38–43 cm 30–33 cm
Lifespan 11–13 years 9–14 years
Energy level
Trainability
Grooming needs
Good with kids
Good with other pets
Hypoallergenic
Watchdog instinct
Novice-owner OK

🐢 Boston Terrier

Temperament

Lively, affectionate, intelligent, gentle. Bostons are eager to please (easier to train than most flat-faced breeds) and excellent with children. Generally friendly with strangers and other dogs.

Exercise

45–60 minutes of moderate daily exercise. Avoid heat, but Bostons handle heat better than Frenchies or Pugs.

Grooming

Short coat, weekly brushing, occasional bath. Wipe facial folds (less prominent than Frenchies/Pugs) weekly.

Health

Mild BOAS in some lines. Eye conditions (corneal ulcers β€” eyes are prominent). Patellar luxation. Allergies. Generally healthier and longer-lived than other brachycephalic breeds.

Full Boston Terrier profile β†’

πŸ• Cavalier King Charles Spaniel

Temperament

Affectionate, gentle, eager to please, sociable. Cavaliers form deep bonds with everyone in the household and tend to follow their humans from room to room. They're famously good with children, other dogs and cats.

Exercise

40–60 minutes of moderate daily exercise plus indoor play. Cavaliers retain some sporting-spaniel drive and enjoy retrieving and scent walks.

Grooming

Long, silky coat with feathering on ears, legs and tail. Brush 3–4Γ— weekly. Bathe every 6–8 weeks. Ear hair needs trimming and ears need weekly cleaning. Eye discharge collects under the eyes β€” wipe daily.

Health

Mitral valve disease β€” by age 10, ~70% of Cavaliers have heart murmurs. Annual cardiology screening from age 5 strongly recommended. Syringomyelia (Chiari-like malformation). Hip dysplasia. Episodic falling syndrome. Always buy from a breeder doing MVD and SM screening.

Full Cavalier King Charles Spaniel profile β†’

Which is right for you?

Pick the Boston Terrier if

Apartment dwellers, families with children, first-time owners, urban couples.

Pick the Cavalier King Charles Spaniel if

Families with children, retirees, multi-pet households, first-time owners.

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