American Staffordshire Terrier vs Newfoundland
A side-by-side comparison to help you find the right breed for your lifestyle.
American Staffordshire Terrier
The American Staffordshire Terrier is a muscular and agile breed known for its loyalty, intelligence, and affectionate nature. Originally bred for strength and courage, they make excellent companions due to their playful demeanor and strong bond with their families.
Large
High
12-16 yrs
N/A
Newfoundland
Also known as: Newf, Newfie, Gentle Giant
The Newfoundland is a giant, gentle breed renowned for its impressive strength, thick water-resistant coat, and remarkable swimming ability. Bred to haul fishing nets and pull carts in the freezing North Atlantic, they're often called 'gentle giants' and are famous as 'nanny dogs' for their patient nature with children. But be prepared: a 150lb dog with separation anxiety can destroy drywall in minutes, and the slobber reaches ceilings.
Extra Large
Medium
9-10 yrs
66-71 cm
55-80 kg
Quick Comparison
| Trait | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| 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 | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Size | Large | Extra Large |
| Energy Level | High | Medium |
| Grooming | Medium | High |
| Trainability | Moderate | Moderate |
| Barking Level | Low | Low |
| Shedding Level | Medium | High |
| Housing | Yard | Yard |
Owner Fit & Decision Guide
Owner Match
| Trait | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Experience Level | Beginner | Beginner (temperament) but Advanced (logistics/finances) |
| First-Time Owner | ||
| Ideal Owner | Active individual or family who can provide adequate exercise and training for a American Staffordshire Terrier. | Someone with a house and yard, works from home or flexible schedule, tolerant of slobber/hair/mess, financially prepared for giant breed costs, has or can get large vehicle for transport, and ideally has mentor or professional trainer for first-time giant breed ownership. |
American Staffordshire Terrier Dealbreakers
- Cannot meet 60-90 min daily exercise
- Cannot commit to grooming needs
Newfoundland Dealbreakers
- Tight budget - if $3,000 vet bill is a disaster
- Clean freak - cannot have pristine home with a Newfie
- Tiny living space - they take up physical floor space
- Hot climate without AC
- Unable to physically manage a 150lb dog
Surrender Risk
| Factor | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Risk Level | Medium | Medium |
| Primary Reasons | Underestimated exercise needs, Behavioral challenges, Cost of care | 'He got too big' - owners underestimate reality of 150lb dog in a hallway, Medical costs - giant breed vet bills are shocking to unprepared owners, Grooming/mess - drool and hair become unmanageable for some |
Temperament & Personality
Behavior Comparison
| Trait | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Prey Drive | ||
| Watchdog Ability | ||
| Stranger Friendly | ||
| Drool Level | ||
| Wanderlust |
Vocalization
| Trait | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Barking Level | Low | Low |
| Howling Tendency | ||
| Whining Tendency | Low | Low |
| Separation Vocalization |
Safety & Reliability
| Trait | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Escape Artist | ||
| Dog Park Suitable | ||
| Off-Leash Reliable | ||
| Small Animal Safe | ||
| Leash Reactivity | ||
| Resource Guarding Risk | Low | Low |
American Staffordshire Terrier Social Traits
Low
Selective
Newfoundland Social Traits
None
Generally low - tolerant of other dogs. Same-sex aggression rare but can occur in intact males.
Training
American Staffordshire Terrier
- ** AmStaffs are sensitive and eager to please but can be stubborn. They shut down under harsh correction. Positive reinforcement (treats/toys) combined with strict consistency is required.
Newfoundland
- Start training early while they're still manageable size
- Use social connection and food as motivators
- Harsh methods cause them to shut down completely
- Be consistent - a giant dog that ignores commands is dangerous
American Staffordshire Terrier Considerations
This is a primary dealbreaker. Many AmStaffs cannot live peacefully with housemates of the same sex, regardless of socialization.
The terrier lineage instills a high prey drive. They pose a significant risk to cats, rabbits, and small dogs. This is often not "trainable" but rather something that must be managed for life.
AmStaffs are "velcro dogs" that form intense bonds. This leads to a high prevalence of separation anxiety, manifesting as destructive chewing (walls, crates, furniture) when left alone.
Newfoundland Considerations
Newfoundlands were bred to work closely with fishermen and do not tolerate isolation well. A 150lb dog with separation anxiety can destroy drywall, doors, and furniture in minutes. They need someone home most of the time.
This is non-negotiable. Loose jowls trap saliva - when they shake their heads, 'slobber strings' reach ceilings, walls, and guests. If you're house-proud or easily grossed out, this breed is incompatible with your lifestyle.
Between 6-18 months, they're large, clumsy, and energetic with no body awareness. They accidentally injure children or elderly owners simply by bumping into them. A puppy growing 10lbs/month is logistically immense.
Everything costs 2-3x more: $100-150/month food, $100-250/month insurance, medications priced by weight. If a $3,000 vet bill is a disaster, do not get this breed.
Multi-Species Compatibility
| Species | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| With Cats | Caution - may chase | High safety - one of the safest giant breeds for multi-pet homes. Drive is 'chase to play' not 'chase to kill.' |
| Small Mammals | Supervision required | Generally safe, but supervise due to size difference |
| Birds / Reptiles | Caution advised | Generally safe with livestock but may accidentally squash chickens trying to play |
Advanced Behavior
| Trait | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Predatory Sequence Risk | Medium | Arrested |
| Biddability | Low | High |
| Noise Sensitivity | Low | Low |
| Territorial Barking | ||
| Same-Sex Aggression Onset | 18 months | N/A |
Newfoundland: Predatory sequence arrested at Eye -> Stalk -> Chase. The 'Grab-Bite' and 'Kill-Bite' are largely inhibited - they may chase a cat but usually just want to sniff or lick it. They are 'protection by presence' dogs - more likely to hold an intruder down or block them than bite. They assess before acting ('Newfie time') rather than responding robotically.
First Year & Life Stages
First Year Challenges
| Challenge | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Puppy Difficulty | ||
| Destructive Phase | 6-18 | 6-18 |
| House Training | Moderate | Easy |
| Crate Training | Medium | Medium |
| Adolescent Regression |
American Staffordshire Terrier: American Staffordshire Terrier puppies require consistent training and patience.
Newfoundland: Temperamentally sweet but logistically immense. Puppy grows 10lbs/month. 'Land shark' biting on a giant breed HURTS. Joint protection is demanding - no stairs, no jumping until 2 years. Must solidify leash manners before they reach 50lbs.
Life Stages Timeline
| Stage | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Puppy Phase | 12 months | 24 months |
| Adolescence | 6-18 | 6-18 |
| Adult Years | 2-8 | 2-7 |
| Senior Onset | ~8 years | ~7 years |
| Peak Energy Age | 1-3 years | 1-3 years |
Size & Physical Characteristics
Physical Stats
| Measurement | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Height | N/A | 66-71 cm |
| Weight | N/A | 55-80 kg |
| Size Category | Large | Extra Large |
| Lifespan | 12-16 years | 9-10 years |
| Litter Size | 4-8 | 6-10 |
American Staffordshire Terrier Coat
Newfoundland Coat
Lineage & Origin
| Detail | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Original Purpose | bloodsports (bull-baiting and dog fighting) | Hauling fishing nets in freezing North Atlantic waters and pulling carts of catch - the 'St. Bernard of the Water' |
| Origin | the "Bull and Terrier" crosses of 19th-century Britain | Newfoundland, Canada - bred for immense strength, water-resistant coat, webbed feet, and gentle disposition |
Breeding Details
| Detail | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| C-Section Rate | Varies | Low |
| Whelping Difficulty | Medium | Medium |
| Puppy Mortality Rate | Low | Low |
Physical Risks
| Risk | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Bloat / GDV Risk | Low | High |
| Slippery Floor Risk | Low | High |
| Min Fence Height | 1.5m | 1.5m |
| Dig / Escape Risk | Low | Low |
Health & Common Conditions
American Staffordshire Terrier Health Issues
Newfoundland Health Issues
American Staffordshire Terrier Suggested Tests
- Genetic Testing (NCL-A)
- Cardiac Screening (echocardiograms)
Newfoundland Suggested Tests
- Cardiac (Cardiologist Echo) - CHIC required
- Hips (OFA or PennHIP) - CHIC required
- Elbows X-rays - CHIC required
- Cystinuria DNA test - CHIC required
Health Risk Overview
| Risk Factor | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Cancer Risk | Medium | Medium |
| Cardiac Risk | Low | Very High |
| Neurological Risk | Low | Low |
| CCL/ACL Tear Risk | Low | High |
| Vet Burden Tier | Medium | Very High |
Sensitivities & Allergies
| Sensitivity | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Skin Allergies | ||
| Environmental Allergies | ||
| Stomach Sensitivity | Low | Medium |
| Food Allergies |
Health Maintenance
| Care Item | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Nail Growth Rate | Normal | Normal |
| Eye Care Needs | Low | Low |
| Anal Gland Issues | Occasional | Occasional |
Senior Care & Aging
American Staffordshire Terrier Senior Care
Common Senior Issues
- Arthritis
- Vision decline
- Cognitive changes
Senior care varies by individual health.
Newfoundland Senior Care
Common Senior Issues
- Hind-end weakness (mobility issues)
- Heart disease
- Arthritis
Decline can be rapid. Be prepared to assist a 150lb dog who cannot stand up - harnesses and ramps become daily tools. Quality of life decisions are complex due to physical impossibility of managing an immobile giant dog.
Grooming & Care
American Staffordshire Terrier
medium maintenanceNewfoundland
high maintenanceLifestyle Compatibility
American Staffordshire Terrier Daily Life
Newfoundland Daily Life
Housing & Legal Restrictions
| Restriction | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| BSL Restricted | ||
| Common Rental Ban | ||
| Insurance Blacklist | ||
| Weight Category | Under 50lbs | Over 50lbs |
Climate Tolerance
| Climate | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Heat Tolerance | ||
| Cold Tolerance | ||
| Water Affinity | Medium | Very High |
Travel Compatibility
| Activity | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Car Travel | Good | Good |
| Camping | ||
| Beach Friendly | ||
| Hiking Rating | ||
| Cabin Flight Eligible | ||
| Hotel Friendly Size |
Niche Suitability
| Role | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Service Dog | Low | Medium |
| Therapy Dog | Low | High |
| Deep Pressure Therapy | ||
| Canicross / Bikejoring | ||
| Apartment Adaptable | ||
| Tactile / Sensory Friendly | ||
| Livestock Guardian | ||
| Medical Alert | Low | Low |
Costs & Expenses
Upfront Costs
| Cost | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Purchase Price | N/A | $2,000-5,000 |
| Initial Cost Range | $1,000–$2,500 | $2,000–$5,000 |
| Cost Tier |
Ongoing Costs
| Cost | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Monthly Range | $120–$180 | $250–$500 |
| Yearly Range | $1,440–$2,160 | $3,000–$6,000 |
| Food / Month | $60-90 | $100-150 |
| Insurance / Month | $60-90 | $100-250 |
| Grooming / Session | N/A | $100-150 |
| Vet Routine / Year | $50-150 | $800-1,500 |
| Monthly Cost Tier |
American Staffordshire Terrier Lifetime Cost
N/A
Newfoundland Lifetime Cost
$30,000-60,000
Quirks & Fun Facts
Daily Quirks
| Quirk | American Staffordshire Terrier | Newfoundland |
|---|---|---|
| Snoring | ||
| Flatulence | Occasional | Occasional |
| Slobber Level | Low | Heavy |
| Smell When Wet | Moderate | Strong |
| Zoomies Frequency | Occasional | Rare |
| Counter Surfing | ||
| Digging Tendency | Low | Low |
Newfoundland Quirks
The Newfie Lean
Will lean their entire weight (up to 150lbs) against your legs to show affection - can knock you off balance
Ceiling Slobber
Slobber strings can reach ceilings, walls, and unsuspecting guests when they shake their heads. Non-negotiable.
Water Magnet
They will try to enter ANY body of water - mud puddles, decorative ponds, kiddie pools. Also submerge their muzzle when drinking, dripping water across kitchen floors.
Lap Dog Delusion
A 150lb dog who believes they should sit in your lap. They will try.
Frequently Asked Questions
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