Boston Terrier vs Great Pyrenees
A side-by-side comparison to help you find the right breed for your lifestyle.
Boston Terrier
Also known as: American Gentleman, Boston Bull, Boston Bull Terrier
The Boston Terrier is a compact, tuxedo-marked companion known as the 'American Gentleman' for its polite demeanor. Originally bred in Boston from English Bulldogs and White English Terriers, this breed transitioned from pit fighter to beloved family companion. They're adaptable, affectionate, and perfect for apartment living - but come with significant health considerations.
Small
Medium
11-13 yrs
38-43 cm
Great Pyrenees
Also known as: Pyr, Pyrenean Mountain Dog, Chien de Montagne des Pyrenees
The Great Pyrenees is a majestic livestock guardian weighing 38-72 kg, bred to work independently in the Pyrenees Mountains. While gentle with family, their nocturnal barking, roaming instinct, and independent nature require experienced owners with secure fencing. Not recommended for apartments or first-time owners.
Extra Large
Medium
10-12 yrs
65-82 cm
Quick Comparison
| Trait | Boston Terrier | Great Pyrenees |
|---|---|---|
| Energy | ||
| Trainability | ||
| Grooming Needs | ||
| Family Friendly | ||
| Independence |
Key Characteristics
| Good with Kids | ||
| Good with Dogs | ||
| Good with Cats | ||
| Hypoallergenic | ||
| Apartment Friendly | ||
| First-Time Owner OK |
| Detail | Boston Terrier | Great Pyrenees |
|---|---|---|
| Size | Small | Extra Large |
| Energy Level | Medium | Medium |
| Grooming | Low | High |
| Trainability | Easy | challenging |
| Barking Level | Low | High |
| Shedding Level | Low | High |
| Chew strength | Moderate | Moderate |
| Housing | Apartment | Acreage |
Owner Fit & Decision Guide
Owner Match
| Trait | Boston Terrier | Great Pyrenees |
|---|---|---|
| Experience Level | Beginner | Advanced |
| First-Time Owner | ||
| Ideal Owner | Apartment dweller, work-from-home professional, retiree, or anyone wanting an affectionate companion who can handle a gassy, snoring shadow | Experienced owner with acreage or large securely fenced yard, tolerant of nocturnal barking, understanding of independent working breeds, possibly with livestock to guard. Patient with training and comfortable with a dog that thinks for itself. |
Boston Terrier Dealbreakers
- Want a running partner (heat intolerance)
- Away from home 8+ hours daily (separation anxiety)
- Cannot afford pet insurance or $2,000 emergency fund
- Repulsed by snoring or flatulence
Great Pyrenees Dealbreakers
- Live in an apartment or rental
- Have close neighbors sensitive to barking
- Want a dog that obeys commands instantly
- Don't have a secure physical fence
- Want a pristine, fur-free home
- Need a running or high-intensity exercise partner
Surrender Risk
| Factor | Boston Terrier | Great Pyrenees |
|---|---|---|
| Risk Level | Low | High |
| Primary Reasons | Health/Financial - cannot afford surgery for knees or management of severe allergies, Housing - landlord restrictions or moving to unsuitable climate, Underestimating flatulence and snoring | Nocturnal barking - owners get a fluffy puppy that starts barking all night at 1 year old, Roaming/escape - jumping fences to expand territory, Resource guarding - growling over food scares families who expected Golden Retriever temperament, Size underestimated - 120lb dog that refuses to move and may growl when asked to get off couch |
Temperament & Personality
Behavior Comparison
| Trait | Boston Terrier | Great Pyrenees |
|---|---|---|
| Prey Drive | ||
| Watchdog Ability | ||
| Stranger Friendly | ||
| Drool Level | ||
| Wanderlust |
Vocalization
| Trait | Boston Terrier | Great Pyrenees |
|---|---|---|
| Barking Level | Low | High |
| Howling Tendency | ||
| Whining Tendency | Low | Low |
| Separation Vocalization |
Safety & Reliability
| Trait | Boston Terrier | Great Pyrenees |
|---|---|---|
| Escape Artist | ||
| Dog Park Suitable | ||
| Off-Leash Reliable | ||
| Small Animal Safe | ||
| Leash Reactivity | ||
| Resource Guarding Risk | Low | Moderate to High |
Boston Terrier Social Traits
None
Generally good with other dogs, some male posturing with intact males
Great Pyrenees Social Traits
High
Same-sex aggression common, especially females. Keep opposite-sex pairs for peace.
Training
Boston Terrier
- They are sensitive - harsh corrections cause them to shut down
- Use their high food motivation to your advantage
- Be consistent - don't tolerate jumping/nipping just because they're small
Great Pyrenees
- Must convince them your request is worth their effort
- Harsh corrections cause shutdown or defensive behavior
- Focus on management over strict obedience
- Accept that recall will never be 100% reliable
Boston Terrier Considerations
Boston Terriers are extreme 'Velcro dogs' that bond intensely. Left alone for more than 4-6 hours, they develop destructive chewing, house soiling, and persistent vocalization. Not suitable if all adults work full-time away from home.
It is impossible to overstate this issue. Their brachycephalic anatomy causes them to swallow air while eating, resulting in frequent, potent gas. If flatulence repulses you rather than amuses you, this is NOT your breed.
Their shortened airways prevent efficient panting. They are at HIGH RISK of heatstroke at temperatures above 25°C (77°F). Air conditioning is a requirement, not a luxury. You cannot take them jogging or hiking in summer.
Expect loud snoring, snorting, and episodes of reverse sneezing that sound like the dog is choking. If you need silence to sleep, this breed is not for you.
Great Pyrenees Considerations
The #1 complaint from suburban owners. Pyrs are genetically hardwired to patrol and bark at night - they were bred to ward off wolves and bears. This instinct cannot be trained out, only managed. Expect deep, booming barks at 2 AM when a leaf blows across the driveway.
Great Pyrenees do not believe in property lines. Without a secure 5-6 foot physical fence, they will expand their territory to include the entire neighborhood. They are notorious escape artists and will take the shock from invisible fences to pursue threats.
Adult Pyrs often exhibit severe aggression toward dogs of the same sex, particularly females. This usually manifests around social maturity (18-24 months). Opposite-sex pairs are generally recommended.
Pyrs are not dumb - they are independent. When called, they evaluate whether coming is more important than what they are currently doing (usually guarding). If they decide it isn't, they will ignore you completely.
Multi-Species Compatibility
| Species | Boston Terrier | Great Pyrenees |
|---|---|---|
| With Cats | Excellent - generally great with cats, especially if introduced young | Excellent - bred to protect vulnerable animals, views cats as part of the flock to guard |
| Small Mammals | Caution - may retain terrier ratting instincts with hamsters/guinea pigs | Good - low prey drive, protective instinct toward smaller animals in their family |
| Birds / Reptiles | Caution - should not be trusted alone with free-roaming birds | Good with supervision - generally safe due to arrested predatory sequence |
Advanced Behavior
| Trait | Boston Terrier | Great Pyrenees |
|---|---|---|
| Predatory Sequence Risk | Arrested | Arrested |
| Biddability | High | Low |
| Noise Sensitivity | Low | Low |
| Territorial Barking | ||
| Same-Sex Aggression Onset | N/A | 18 months |
Boston Terrier: Predatory sequence is Eye -> Stalk -> Chase. Grab-Bite and Kill-Bite are largely inhibited, though they may still dispatch small rodents (terrier heritage).
Great Pyrenees: Predatory sequence arrested early - may chase predators to drive away but lack dissect/consume drive. Brilliant problem solvers but low 'working intelligence' (willingness to follow commands). Bred to work without humans so don't look to humans for answers.
First Year & Life Stages
First Year Challenges
| Challenge | Boston Terrier | Great Pyrenees |
|---|---|---|
| Puppy Difficulty | ||
| Destructive Phase | 6-12 | 6-18 |
| House Training | Medium | Medium |
| Crate Training | High | Medium |
| Adolescent Regression |
Boston Terrier: Housetraining can be challenging due to small bladders and dislike of cold/wet weather. They're not destructive chewers by nature - main challenge is potty training.
Great Pyrenees: Pyr puppies are large, stubborn land sharks. A 6-month-old is the size of a German Shepherd but has the brain of a toddler. Critical socialization window 8-16 weeks - must expose to strangers, other dogs, and strange noises or natural guarding instinct can turn into fear-aggression.
Life Stages Timeline
| Stage | Boston Terrier | Great Pyrenees |
|---|---|---|
| Puppy Phase | 12 months | 18 months |
| Adolescence | 6-18 | 10-24 |
| Adult Years | 1-8 | 2-8 |
| Senior Onset | ~8 years | ~8 years |
| Peak Energy Age | 6-18 months | 1-2 years |
Size & Physical Characteristics
Physical Stats
| Measurement | Boston Terrier | Great Pyrenees |
|---|---|---|
| Height | 38-43 cm | 65-82 cm |
| Weight | Not enough data yet | Not enough data yet |
| Size Category | Small | Extra Large |
| Lifespan | 11–13 years | 10–12 years |
| Litter Size | 3-5 | 6-10 |
Boston Terrier Coat
Great Pyrenees Coat
Lineage & Origin
| Detail | Boston Terrier | Great Pyrenees |
|---|---|---|
| Original Purpose | Originally bred for pit fighting and ratting (weighed up to 44 lbs), rapidly refined to companion dog by late 1800s | Autonomous livestock guardian - protecting sheep from wolves and bears in the Pyrenees Mountains without human guidance |
| Origin | Boston, Massachusetts, USA, late 19th century (English Bulldog x White English Terrier) | Pyrenees Mountains (France/Spain), ancient breed |
Breeding Details
| Detail | Boston Terrier | Great Pyrenees |
|---|---|---|
| C-Section Rate | 92% | Low |
| Whelping Difficulty | Extreme | Easy |
| Puppy Mortality Rate | Medium | Low |
Physical Risks
| Risk | Boston Terrier | Great Pyrenees |
|---|---|---|
| Bloat / GDV Risk | Low | High |
| Slippery Floor Risk | Low | Medium |
| Min Fence Height | 1.2m | 1.5m |
| Dig / Escape Risk | None | High |
Health & Common Conditions
Boston Terrier Health Issues
Great Pyrenees Health Issues
Boston Terrier Suggested Tests
- JHC (Juvenile Hereditary Cataracts) DNA Test - CRITICAL
- BOAS Assessment (functional breathing test)
- Patella Evaluation
- Ophthalmologist Evaluation
- Cardiac Exam
Great Pyrenees Suggested Tests
- Gastropexy (stomach tacking) - recommended during spay/neuter
- Neuronal Degeneration (NDG) DNA test
- Hip Evaluation (OFA)
- Elbow Evaluation
- Patella Evaluation
Health Risk Overview
| Risk Factor | Boston Terrier | Great Pyrenees |
|---|---|---|
| Cancer Risk | Low | High (osteosarcoma) |
| Cardiac Risk | Low | Low |
| Neurological Risk | Medium | Medium (NDG) |
| CCL/ACL Tear Risk | Medium | Medium |
| Vet Burden Tier | High | High |
Sensitivities & Allergies
| Sensitivity | Boston Terrier | Great Pyrenees |
|---|---|---|
| Skin Allergies | ||
| Environmental Allergies | ||
| Stomach Sensitivity | High | Low |
| Food Allergies | Chicken, Grains | Generally robust |
Health Maintenance
| Care Item | Boston Terrier | Great Pyrenees |
|---|---|---|
| Nail Growth Rate | Normal | Normal |
| Eye Care Needs | High | Medium (entropion risk) |
| Anal Gland Issues | Occasional | Rare |
Senior Care & Aging
Boston Terrier Senior Care
Common Senior Issues
- Cataracts / Nuclear Sclerosis (bluish haze)
- Arthritis (especially knees)
- Cognitive decline
Most seniors develop some form of eye cloudiness. Use ramps for furniture to protect spine and arthritic joints.
Great Pyrenees Senior Care
Common Senior Issues
- Arthritis/mobility decline
- Osteosarcoma (bone cancer)
- Hip dysplasia progression
- Vision decline
Mobility slows around 8+ years. Arthritis management becomes primary focus. Ramps for cars and stairs become necessary.
Grooming & Care
Boston Terrier
low maintenanceGreat Pyrenees
high maintenanceLifestyle Compatibility
Boston Terrier Daily Life
Great Pyrenees Daily Life
Housing & Legal Restrictions
| Restriction | Boston Terrier | Great Pyrenees |
|---|---|---|
| BSL Restricted | ||
| Common Rental Ban | ||
| Insurance Blacklist | ||
| Weight Category | Under 25lbs | Over 50lbs |
Climate Tolerance
| Climate | Boston Terrier | Great Pyrenees |
|---|---|---|
| Heat Tolerance | ||
| Cold Tolerance | ||
| Water Affinity | Low | Low |
Travel Compatibility
| Activity | Boston Terrier | Great Pyrenees |
|---|---|---|
| Car Travel | Good | Good |
| Camping | ||
| Beach Friendly | ||
| Hiking Rating | ||
| Cabin Flight Eligible | ||
| Hotel Friendly Size |
Niche Suitability
| Role | Boston Terrier | Great Pyrenees |
|---|---|---|
| Service Dog | Low | Low |
| Therapy Dog | High | Low |
| Deep Pressure Therapy | ||
| Canicross / Bikejoring | ||
| Apartment Adaptable | ||
| Tactile / Sensory Friendly | ||
| Livestock Guardian | ||
| Medical Alert | Low | None |
Costs & Expenses
Upfront Costs
| Cost | Boston Terrier | Great Pyrenees |
|---|---|---|
| Purchase Price | $1,500-3,000 | $1,800-4,000 |
| Initial Cost Range | $1,500–$3,000 | $1,800–$4,000 |
| Cost Tier |
Ongoing Costs
| Cost | Boston Terrier | Great Pyrenees |
|---|---|---|
| Monthly Range | $125–$200 | $180–$300 |
| Yearly Range | $1,500–$3,000 | $2,160–$3,600 |
| Food / Month | $25-45 | $100-150 |
| Insurance / Month | $50-100 | $50-80 |
| Grooming / Session | $30-50 | $100-200 |
| Vet Routine / Year | $500-1,500 | $600-1,500 |
| Monthly Cost Tier |
Boston Terrier Lifetime Cost
$20,000-40,000
Great Pyrenees Lifetime Cost
$25,000-45,000
Quirks & Fun Facts
Daily Quirks
| Quirk | Boston Terrier | Great Pyrenees |
|---|---|---|
| Snoring | ||
| Flatulence | Frequent | Rare |
| Slobber Level | None | Moderate |
| Smell When Wet | Mild | Mild |
| Zoomies Frequency | Daily (puppies) | Rare |
| Counter Surfing | ||
| Digging Tendency | None | High |
Boston Terrier Quirks
The Gas Factory
Expect frequent, potent flatulence due to swallowing air while eating. Slow-feeders and probiotics help reduce but never eliminate.
Reverse Sneezing
A spasm of the soft palate that sounds like a terrifying asthma attack. Usually harmless - gently massage throat to stop it.
The Sunbather
They LOVE to bake in sun patches, but must be supervised to prevent heatstroke. Their heat regulation is poor.
The Burrower
They love to sleep under blankets and will burrow into bedding. Perfect for cold nights, concerning for hot ones.
Great Pyrenees Quirks
The Pyr Paw
Will forcefully paw at you to demand attention - can be painful given their size and claw strength
The Pyr Lean
Shows affection by leaning their entire 100lb+ weight against your legs
Mud Magnet
White coat is surprisingly self-cleaning (mud dries and falls off) - but the mud falls off onto your floor
Selective Deafness
Will evaluate your command, decide if it's worth their effort, and ignore you if it isn't
Snow Obsession
Will refuse to come inside during snowstorms - thrive in freezing temperatures
Frequently Asked Questions
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