Side by side
Both columns come from the same cost model, so every row is a like for like comparison.
| Measure | Boston Terrier | Cavalier King Charles Spaniel |
|---|---|---|
| Lifetime cost | $31,211 | $36,847 |
| First year | $5,751 | $6,732 |
| Monthly average | $220 | $260 |
| Puppy price | $1,200 to $3,000 | $1,800 to $3,500 |
| Routine care, yearly | $2,277 | $2,708 |
| Documented conditions | 20 | 26 |
| Median lifespan | 11.8 yrs | 11.8 yrs |
| Adult weight | 12 to 25 lb | 13 to 18 lb |
| Daily food | 1.5 cups | 1.3 cups |
| Grooming, yearly | $184 | $668 |
| Risk profile | High, early onset | High, mid life |
| Biggest single risk | Skin disease | Heart murmur and mitral valve disease |
Health risks compared
What tends to go wrong in each breed, how often, and what it costs to treat.
| Condition | Measured result | Treatment cost |
|---|---|---|
| Skin disease | 36%1-yr clinical | $252–$679 |
| Digestive disease | 30%1-yr clinical | $354–$954 |
| Extracted teeth (US) | 18%lifetime, owner | not priced |
| Musculoskeletal disease | 15%1-yr clinical | $281–$756 |
| Giardia (US) | 13%lifetime, owner | not priced |
| Periodontal disease | 13%1-yr clinical | $246–$663 |
| Hip dysplasia | 13%screened dogs | $1,200–$3,500 |
| Dental calculus (US) | 12%lifetime, owner | not priced |
| Cataracts (US) | 12%lifetime, owner | not priced |
| Dog bite (US) | 10%lifetime, owner | not priced |
| Seasonal allergies (US) | 9%lifetime, owner | not priced |
| Patellar luxation (US) | 9%lifetime, owner | not priced |
| Ear Infection (US) | 8%lifetime, owner | not priced |
| Torn or broken toenail (US) | 8%lifetime, owner | not priced |
| Murmur (US) | 8%lifetime, owner | not priced |
| Ear infection | 7%1-yr clinical | $100–$270 |
| Anal sac impaction | 7%1-yr clinical | $84–$226 |
| Elbow dysplasia | 5%screened dogs | $3,000–$5,000 |
| Degenerative myelopathy | 3%screened dogs | not priced |
| Congenital heart disease | 1%screened dogs | $534–$1,438 |
| Brachycephalic airway signs | n/a | $1,784–$4,802 |
| Corneal ulceration | n/a | $469–$1,264 |
| Patellar luxation | n/a | $1,000–$5,000 |
| Condition | Measured result | Treatment cost |
|---|---|---|
| Heart murmur and mitral valve disease | 31%1-yr clinical | $534–$1,438 |
| Skin disease | 36%1-yr clinical | $252–$679 |
| Murmur (US) | 36%lifetime, owner | not priced |
| Extracted teeth (US) | 35%lifetime, owner | not priced |
| Dental calculus (US) | 26%lifetime, owner | not priced |
| Degenerative myelopathy | 23%screened dogs | not priced |
| Hip dysplasia | 16%screened dogs | $1,200–$3,500 |
| Musculoskeletal disease | 15%1-yr clinical | $281–$756 |
| Digestive disease | 11%1-yr clinical | $354–$954 |
| Deafness (US) | 11%lifetime, owner | not priced |
| Heart (cardiac) murmur | 10%owner survey | $534–$1,438 |
| Dental disease | 10%1-yr clinical | $246–$663 |
| Ear Infection (US) | 9%lifetime, owner | not priced |
| Anal sac impaction (US) | 9%lifetime, owner | not priced |
| Ear infection | 7%1-yr clinical | $100–$270 |
| Mitral valve disease (MVD) | 7%owner survey | $534–$1,438 |
| Anal sac impaction | 7%1-yr clinical | $84–$226 |
| Hearing loss (incompletely deaf) (US) | 7%lifetime, owner | not priced |
| Seasonal allergies (US) | 6%lifetime, owner | not priced |
| Chocolate (US) | 6%lifetime, owner | not priced |
| Gingivitis (US) | 6%lifetime, owner | not priced |
| Umbilical hernia | 6%owner survey | $621–$1,671 |
| Keratoconjunctivitis sicca (KCS Dry Eye) | 4%owner survey | $224–$604 |
| Patellar luxation/Slipping kneecap | 3%owner survey | $1,000–$5,000 |
| Anal gland/sac impaction/blockage | 3%owner survey | $84–$226 |
| Arthritis | 3%owner survey | $281–$756 |
| Patellar luxation | 2%screened dogs | $1,000–$5,000 |
| Elbow dysplasia | 2%screened dogs | $3,000–$5,000 |
| Congenital heart disease | 2%screened dogs | $534–$1,438 |
| Syringomyelia | n/a | $1,485–$3,999 |
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Both breeds carry surgical risk, and premiums are priced by breed
Expected vet costs are $0 for the Boston Terrier and $2,986 for the Cavalier King Charles Spaniel. Every policy excludes anything already diagnosed, so this is worth sorting out before you pick either dog.
Common questions
Is a Boston Terrier or a Cavalier King Charles Spaniel more expensive?
The Boston Terrier is cheaper by about $5,636 over a lifetime. Boston Terrier: $31,211. Cavalier King Charles Spaniel: $36,847. Health costs are not inside either figure. They are documented separately below, in the units each study used.
Which lives longer, a Boston Terrier or a Cavalier King Charles Spaniel?
The Boston Terrier has the longer typical lifespan. Boston Terrier: 11.8 years. Cavalier King Charles Spaniel: 11.8 years.
Which is healthier, a Boston Terrier or a Cavalier King Charles Spaniel?
Both figures below are what it costs to own the dog, not what it costs if something goes wrong. The Boston Terrier's biggest single risk is skin disease, seen in 36% of the breed. For the Cavalier King Charles Spaniel it is heart murmur and mitral valve disease, at 31%.
How we calculated this
Both breeds run through one model, so the comparison is like for like. Full method.