Mastiff vs Scottish Sheepdog Longhair
A side-by-side comparison to help you find the right breed for your lifestyle.
Mastiff
Also known as: English Mastiff, Old English Mastiff
The Mastiff (English Mastiff) is a giant guardian breed of immense dignity, courage, and docility. With ancestors depicted in Assyrian bas-reliefs from 2500 BC, these ancient war dogs and estate guardians have been bred down to gentle family companions. But the reality of living with a dog that can exceed 200lbs is often romanticized - between the short 6-10 year lifespan, potential for bone cancer, and costs that dwarf most breeds, they're called a 'heartbreak breed' for good reason.
Extra Large
Low
6-10 yrs
70-76+ cm
70-104+ kg
Scottish Sheepdog Longhair
Also known as: Rough Collie, Lassie Dog, Scottish Collie, Long-Haired Collie
The Scottish Sheepdog Longhair, also known as the Rough Collie, is a highly intelligent and elegant herding breed renowned for its striking long coat, loyalty, and gentle temperament. Made famous by 'Lassie,' this breed was originally developed in the Scottish Highlands as a shepherd's dog and is now cherished as a devoted family companion.
Large
Medium
12-14 yrs
56-66 cm
Quick Comparison
| Trait | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| 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 | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Size | Extra Large | Large |
| Energy Level | Low | Medium |
| Grooming | High | High |
| Trainability | challenging | Easy |
| Barking Level | Medium | High |
| Shedding Level | Medium | High |
| Chew strength | Hard | Moderate |
| Housing | Yard | Yard |
Owner Fit & Decision Guide
Owner Match
| Trait | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Experience Level | Advanced | Beginner |
| First-Time Owner | ||
| Ideal Owner | Experienced large breed owner with house and yard. Works from home or can be home most of the day. Financially prepared for $3,000+ annual costs and $5,000+ emergency fund. Physically able to manage 200lb dog. Psychologically prepared for 6-10 year lifespan and likely cancer diagnosis. | Patient person or family who appreciates regular grooming as bonding time. Tolerant of barking or willing to train 'quiet' command. Enjoys moderate activity but not extreme athletics. Uses positive reinforcement training methods. |
Mastiff Dealbreakers
- Apartment living (unless ground floor and extremely dedicated)
- Fastidious cleaners (drool/hair is unmanageable)
- Tight budget (one vet bill can bankrupt you)
- Physically frail owners (cannot hold 200lb dog on leash)
- Cannot emotionally handle short lifespan
Scottish Sheepdog Longhair Dealbreakers
- Cannot tolerate barking
- Want a 'wash and go' dog - grooming is a hobby here
- Want a dog to jog 10 miles with you in July
- Use harsh training methods - they are 'soft' dogs that shut down
Surrender Risk
| Factor | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Risk Level | Medium | Low |
| Primary Reasons | 'Moving/Housing Restrictions' - landlords evict due to size/breed, Cost - giant breed vet bills shock unprepared owners, Cute puppy becomes 150lb adolescent they can't afford to feed or vet | Barking - underestimated volume and frequency, Shedding/Grooming - extreme hair and time commitment, Lassie Effect - unrealistic expectations from TV show |
Temperament & Personality
Behavior Comparison
| Trait | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Prey Drive | ||
| Watchdog Ability | ||
| Stranger Friendly | ||
| Drool Level | ||
| Wanderlust |
Vocalization
| Trait | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Barking Level | Medium | High |
| Howling Tendency | ||
| Whining Tendency | Low | Medium |
| Separation Vocalization |
Safety & Reliability
| Trait | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Escape Artist | ||
| Dog Park Suitable | ||
| Off-Leash Reliable | ||
| Small Animal Safe | ||
| Leash Reactivity | ||
| Resource Guarding Risk | Moderate | Low |
Mastiff Social Traits
High
Same-sex aggression can develop around 18-24 months. Socialization critical to prevent wariness becoming fear-aggression.
Scottish Sheepdog Longhair Social Traits
Moderate
Generally dog neutral to friendly. Same-sex aggression is rare.
Training
Mastiff
- Ask once, then lure/help them succeed
- Train for partnership, not just obedience
- Start leash manners EARLY before they're physically unmanageable
- Use high-value treats - they are food motivated
Scottish Sheepdog Longhair
- Keep sessions short (5-10 mins) and fun
- Harsh corrections will cause them to shut down or become fearful
- They are intelligent but not 'neurotic' about problem-solving like Border Collies
- Train 'quiet' command early to manage barking
Mastiff Considerations
Average lifespan is only 6-10 years, with 8 being the median. Owners must be psychologically prepared to lose their companion just as they enter their senior years. Bone cancer is the leading cause of death.
Unlike eager-to-please breeds, Mastiffs often ask 'Why?' before complying. When they decide not to cooperate, they simply flatten themselves to the floor - physically unmanageable at 200lbs. Harsh training causes complete shutdown.
Mature Mastiffs can develop intolerance toward dogs of the same sex, typically emerging around 18-24 months. Difficult to manage due to sheer power differential between owner and dog.
$150-300/month for food alone. Insurance $100-200+/month. All medications priced by weight (3-4x cost of Labrador). A single emergency can exceed $5,000. If this would bankrupt you, do not get this breed.
Scottish Sheepdog Longhair Considerations
Bred to communicate with shepherds over long distances, Collies alert to everything: delivery trucks, neighbors, squirrels, and wind. Unlike a guard dog's warning bark, a Collie often barks to chat or express boredom. The bark is sharp and piercing.
Exceptionally sensitive to their environment. Thunderstorms, fireworks, and even loud arguments can cause significant distress. Poor candidates for chaotic households with constant screaming or slamming doors.
The spectacular coat requires weekly 45-60 minute line-brushing sessions. Surface brushing leaves the undercoat to mat, leading to 'felted' dogs that must be shaved - a disaster for double coats. This is a hobby, not a chore.
Young Collies may attempt to herd running children by nipping at heels. This is an arrested predatory sequence behavior, not aggression, but it can be frightening for small children and requires management.
Multi-Species Compatibility
| Species | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| With Cats | Generally safe if raised together - low prey drive | High safety - one of the best large breeds for multi-species homes. Low prey drive. |
| Small Mammals | Generally safe - no terrier-like kill instinct | Generally safe - may try to herd but rarely has grab-bite instinct |
| Birds / Reptiles | Generally neutral | Good with poultry if trained, though may harass if untrained |
Advanced Behavior
| Trait | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Predatory Sequence Risk | Arrested | Arrested |
| Biddability | Low | High |
| Noise Sensitivity | Low | High |
| Territorial Barking | ||
| Same-Sex Aggression Onset | 18 months | N/A |
Mastiff: Predatory sequence arrested: Orient -> Eye -> (Stalk/Chase/Grab/Kill inhibited). They may chase out of territorial instinct but lack 'kill bite' of terriers. High adaptive intelligence (problem-solving), low working intelligence (obedience repetition). They work for partnership, not just kibble.
Scottish Sheepdog Longhair: Predatory sequence is Orient → Eye → Stalk → (Stop). They may stare at and follow cats but grab-bite is largely inhibited. They WANT to work with you - unlike Huskies who ask 'what's in it for me?' a Collie asks 'what do you want me to do?'
First Year & Life Stages
First Year Challenges
| Challenge | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Puppy Difficulty | ||
| Destructive Phase | 6-18 | 6-14 |
| House Training | Medium | Easy |
| Crate Training | Medium | High |
| Adolescent Regression |
Mastiff: Calmer than sporting/herding breeds but 6-month puppy can weigh 80lbs with baby brain. They are clumsy, mouthy, and accidentally knock over children/furniture. Teething Mastiff can chew through solid wood door frames. A rebellious 150lb teenager pulling on leash is a safety hazard.
Scottish Sheepdog Longhair: Collie puppies are generally polite and observant, easier than Labradors or high-drive breeds. Main challenges are noise sensitivity and socialization to prevent shyness. May need ear taping for classic semi-prick look (cosmetic only).
Life Stages Timeline
| Stage | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Puppy Phase | 18 months | 12 months |
| Adolescence | 18-36 | 6-18 |
| Adult Years | 3-6 | 2-8 |
| Senior Onset | ~6 years | ~9 years |
| Peak Energy Age | 1-2 years | 1-3 years |
Size & Physical Characteristics
Physical Stats
| Measurement | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Height | 70-76+ cm | 56-66 cm |
| Weight | Not enough data yet | Not enough data yet |
| Size Category | Extra Large | Large |
| Lifespan | 6–10 years | 12–14 years |
| Litter Size | 8-10 | 6-10 |
Mastiff Coat
Scottish Sheepdog Longhair Coat
Lineage & Origin
| Detail | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Original Purpose | War dogs, guardians, and hunters of large game (lions, bears, wolves). In England, estate guardians protecting from poachers. Job was to seize and hold intruders using sheer mass. | Gathering and droving sheep in the Scottish Highlands, farm guardianship |
| Origin | Ancient breed - ancestors depicted in Assyrian bas-reliefs from 2500 BC | Scottish Highlands and Northern England, 19th century |
Breeding Details
| Detail | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| C-Section Rate | High | Low |
| Whelping Difficulty | High | Easy |
| Puppy Mortality Rate | Moderate | Low |
Physical Risks
| Risk | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Bloat / GDV Risk | High | High |
| Slippery Floor Risk | High | Low |
| Min Fence Height | 1.8m | 1.3m |
| Dig / Escape Risk | Low | Low |
Health & Common Conditions
Mastiff Health Issues
Scottish Sheepdog Longhair Health Issues
Mastiff Suggested Tests
- PRA (Progressive Retinal Atrophy)
- Cystinuria DNA test
- DM (Degenerative Myelopathy)
- OFA or PennHIP for hips and elbows
- Cardiac evaluation
Scottish Sheepdog Longhair Suggested Tests
- MDR1 (DNA) - CRITICAL
- CEA (DNA + Clinical Exam at 6-8 weeks)
- PRA-rcd2 (DNA)
- Hip Evaluation
Health Risk Overview
| Risk Factor | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Cancer Risk | Very High | Low |
| Cardiac Risk | Medium | Low |
| Neurological Risk | Low | Low |
| CCL/ACL Tear Risk | High | Low |
| Vet Burden Tier | Very High | Medium |
Sensitivities & Allergies
| Sensitivity | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Skin Allergies | ||
| Environmental Allergies | ||
| Stomach Sensitivity | Medium | Low |
| Food Allergies | Generally hardy |
Health Maintenance
| Care Item | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Nail Growth Rate | Fast | Normal |
| Eye Care Needs | Medium | High |
| Anal Gland Issues | Occasional | Rare |
Senior Care & Aging
Mastiff Senior Care
Common Senior Issues
- Bone cancer (osteosarcoma)
- Arthritis (almost guaranteed)
- Heart issues
Rapid decline often starts around 6 years. May need 'Help 'Em Up' harness to assist standing. Euthanasia at home recommended if possible - transporting non-ambulatory 200lb dog to vet clinic is physically impossible for most owners without stretcher and team.
Scottish Sheepdog Longhair Senior Care
Common Senior Issues
- Arthritis in hips/knees
- Cognitive decline
- Vision problems (CEA progression)
High risk of arthritis - introduce ramps for cars early to protect joints. Keep mentally engaged with nosework to slow cognitive decline.
Grooming & Care
Mastiff
high maintenanceScottish Sheepdog Longhair
high maintenanceLifestyle Compatibility
Mastiff Daily Life
Scottish Sheepdog Longhair Daily Life
Housing & Legal Restrictions
| Restriction | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| BSL Restricted | ||
| Common Rental Ban | ||
| Insurance Blacklist | ||
| Weight Category | Over 50lbs | Over 50lbs |
Climate Tolerance
| Climate | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Heat Tolerance | ||
| Cold Tolerance | ||
| Water Affinity | Low | Low |
Travel Compatibility
| Activity | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Car Travel | Good | Good |
| Camping | ||
| Beach Friendly | ||
| Hiking Rating | ||
| Cabin Flight Eligible | ||
| Hotel Friendly Size |
Niche Suitability
| Role | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Service Dog | Low | Medium |
| Therapy Dog | Medium | High |
| Deep Pressure Therapy | ||
| Canicross / Bikejoring | ||
| Apartment Adaptable | ||
| Tactile / Sensory Friendly | ||
| Livestock Guardian | ||
| Medical Alert | Low | Medium |
Costs & Expenses
Upfront Costs
| Cost | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Purchase Price | $1,500-4,000 | $1,500-3,000 |
| Initial Cost Range | $1,500–$4,000 | $1,500–$3,000 |
| Cost Tier |
Ongoing Costs
| Cost | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Monthly Range | $300–$600 | $150–$250 |
| Yearly Range | $3,600–$7,200 | $2,000–$3,000 |
| Food / Month | $150-300 | $60-90 |
| Insurance / Month | $100-200+ | $40-70 |
| Grooming / Session | $75-125 | $80-150 |
| Vet Routine / Year | $450-600 | $600-1,000 |
| Monthly Cost Tier |
Mastiff Lifetime Cost
$25,000-60,000
Scottish Sheepdog Longhair Lifetime Cost
$25,000-40,000
Quirks & Fun Facts
Daily Quirks
| Quirk | Mastiff | Scottish Sheepdog Longhair |
|---|---|---|
| Snoring | ||
| Flatulence | Frequent | Rare |
| Slobber Level | Heavy | None |
| Smell When Wet | Strong | Moderate |
| Zoomies Frequency | Rare | Weekly |
| Counter Surfing | ||
| Digging Tendency | Low | Low |
Mastiff Quirks
The Mastiff Lean
Will lean their full weight (up to 200lbs) against your legs. Fall risk for children and elderly.
Ceiling Slobber
Not just when eating - they shake heads and 'fling' slime. It will be on clothes, walls, and TV.
Passive Resistance
When they don't want to do something, they simply flatten to the floor. Physically impossible to move a 200lb dog that doesn't want to move.
Room-Clearing Gas
Flatulence is frequent and potent, often clearing a room.
Scottish Sheepdog Longhair Quirks
The Collie Nose
They use their long nose to poke, prod, and nudge you - their way of holding hands
The Greeter's Grin
Some Collies 'smile' (bare their teeth) when submissive or happy. Looks terrifying to strangers but is a sign of joy.
Air Snapping
May snap the air when excited or playing
The Off Switch
Unlike Border Collies, Rough Collies have a distinct 'off switch' and are often described as couch potatoes indoors
Frequently Asked Questions
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