Boston Terrier vs Chihuahua
A side-by-side breakdown of size, cost, grooming load and lifestyle fit — with a straight answer on which suits which household.
Short answer
Boston Terrier is the easier breed to live with for most first-time owners — it is easier to train (4/5 vs 2/5); it scores better with children (4/5 vs 1/5); it sheds less (2/5 vs 3/5). Chihuahua makes more sense only if you specifically want a heavier coat to groom and live with.
Comparison table
| Attribute | Boston Terrier | Chihuahua |
|---|---|---|
| Species | dog | dog |
| Origin | United States | Mexico |
| Weight (kg) | 5–11 | 1.5–3 |
| Height (cm) | 23–38 | 15–23 |
| Lifespan (years) | 11–15 | 14–18 |
| Monthly cost (USD) | $58 | $64 |
| Yearly cost (USD) | $696 | $768 |
| Purchase price (USD) | $1600 | $1400 |
| Grooming need (1–5) | 1 | 2 |
| Shedding (1–5) | 2 | 3 |
| Energy (1–5) | 3 | 3 |
| Trainability (1–5) | 4 | 2 |
| Apartment fit (1–5) | 5 | 5 |
| Good with kids (1–5) | 4 | 1 |
| Vocal (1–5) | 1 | 5 |
What the numbers mean
- Boston Terrier weighs 5–11 kg and lives 11–15 years; Chihuahua weighs 1.5–3 kg and lives 14–18 years.
- On estimated monthly cost, Boston Terrier runs about $58/month versus $64/month for Chihuahua — a difference of roughly $6 a month, or $72 a year.
- Both have the same apartment suitability score (5/5).
- Chihuahua has the higher shedding score (3/5 vs 2/5) — higher means more hair on your sofa.
- Chihuahua has the higher grooming requirement (2/5 vs 1/5) — higher means more brushing and professional trimming.
- Both have the same energy level (3/5).
- Boston Terrier has the higher trainability score (4/5 vs 2/5).
- Boston Terrier has the higher kid-friendliness score (4/5 vs 1/5).
- Chihuahua has the higher vocalisation score (5/5 vs 1/5) — higher means more barking or meowing.
Cost over ten years
At the estimated monthly rates above, ten years of routine care (food, treats, grooming, medication, vet visits and supplies — excluding insurance, emergency treatment and purchase price) works out to roughly $6,960 for Boston Terrier and $7,680 for Chihuahua. The gap is $720 — usually larger than the difference in purchase price.
Health profile
Boston Terrier
Chihuahua
Both breeds are associated with Patellar luxation, so screening for these is worth raising with a breeder either way.
Which one should you pick?
- Choose Boston Terrier if you want a breed that copes well in a smaller home, prefer a calmer daily routine, and your budget covers about $58 a month.
- Choose Chihuahua if you want a breed that copes well in a smaller home, prefer a calmer daily routine, and your budget covers about $64 a month.
- Neither, if the grooming load is more than you can sustain; both need regular coat care.