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Bullmastiff vs Cavapoo

A side-by-side comparison to help you find the right breed for your lifestyle.

Bullmastiff breed photo

Bullmastiff

AKCFCIKC

The Bullmastiff is a large, powerful, and loyal breed known for its protective nature and gentle temperament. Originally bred in England as a gamekeeper's companion to guard estates, this breed combines the strength of a Mastiff with the agility of a Bulldog.

Size

Extra Large

Energy

Medium

Lifespan

7-9 years yrs

Height

N/A

VS
Cavapoo breed photo

Cavapoo

AKCFCIKC

The Cavapoo, also known as Cavoodle, combines the gentle, loving nature of the Cavalier King Charles Spaniel with the intelligence and low-shedding coat of the Poodle. This designer breed has gained massive popularity due to its sweet temperament, adaptable size, and suitability for families and individuals alike. Cavapoos are known for forming strong bonds with their owners and thrive on companionship.

Size

Medium

Energy

Medium

Lifespan

10-12 yrs

Height

N/A

Quick Comparison

TraitBullmastiffCavapoo
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
DetailBullmastiffCavapoo
SizeExtra LargeMedium
Energy LevelMediumMedium
GroomingMediumHigh
TrainabilitychallengingEasy
Barking LevelLowMedium
Shedding LevelMediumLow
Chew strengthHardN/A
HousingYardApartment

Owner Fit & Decision Guide

Owner Match

TraitBullmastiffCavapoo
Experience LevelExperiencedBeginner
First-Time Owner
Ideal OwnerActive individual or family who can provide adequate exercise and training for a Bullmastiff.Active individual or family who can provide adequate exercise and training for a Cavapoo.

Bullmastiff Dealbreakers

  • Cannot meet 60-60 min daily exercise
  • Cannot commit to grooming needs

Cavapoo Dealbreakers

  • Cannot meet 45-60 min daily exercise
  • Cannot commit to grooming needs

Surrender Risk

FactorBullmastiffCavapoo
Risk LevelMediumMedium
Primary ReasonsUnderestimated exercise needs, Behavioral challenges, Cost of careUnderestimated exercise needs, Behavioral challenges, Cost of care

Temperament & Personality

Behavior Comparison

TraitBullmastiffCavapoo
Prey Drive
Watchdog Ability
Stranger Friendly
Drool Level
Wanderlust

Vocalization

TraitBullmastiffCavapoo
Barking LevelLowMedium
Howling Tendency
Whining TendencyLowLow
Separation Vocalization
Bullmastiff bark triggers
StrangersDoorbellsOther dogs
Cavapoo bark triggers
StrangersDoorbellsOther dogs

Safety & Reliability

TraitBullmastiffCavapoo
Escape Artist
Dog Park Suitable
Off-Leash Reliable
Small Animal Safe
Leash Reactivity
Resource Guarding RiskLowLow

Bullmastiff Social Traits

Velcro Dog
One Person Dog
Handling ToleranceMedium
Stranger Wariness

Moderate

With Other Dogs

Selective

Cavapoo Social Traits

Velcro Dog
One Person Dog
Handling ToleranceMedium
Stranger Wariness

Low

With Other Dogs

Generally friendly

Training

Bullmastiff

MethodPositive reinforcement
Challenges
forced running or jogging on pavement until growth plates close (18–24 months).
Tips
  • ** Positive reinforcement is the only viable path. Harsh corrections often cause this breed to shut down or become defensive.

Cavapoo

MethodPositive reinforcement
Challenges
Requires consistent, patient training
Tips
  • ** Positive reinforcement is mandatory. They are sensitive souls (Spaniel trait) and will shut down or become fearful with harsh corrections.

Bullmastiff Considerations

challengeSame-Sex Aggression

This is a genetically rooted trait in many Bullmastiffs. While they may coexist peacefully with dogs of the opposite sex, placing two males or two females together often results in severe conflict once they reach social maturity (18–24 months). This aggression is rarely "cured" through training; it is managed.

challengeStubborn Independence

Bred to track and hold poachers silently without human direction, the Bullmastiff is an independent problem solver. They do not have the "will to please" of a Golden Retriever. If a command does not make sense to them, they will simply ignore it. This is often misinterpreted as stupidity; it is actually a refusal to perform rote tasks without high-value motivation.

challengeThe "Velcro" Guardian

While independent in thought, they are physically clingy. They will lean their 120-pound bodies against you, sit on your feet, and follow you from room to room. This constant physical presence can be overwhelming for owners who value personal space.

Cavapoo Considerations

challengePathological Separation Anxiety

This is the single most common behavioral failure mode for the breed. Cavapoos are a mix of two "velcro" breeds: the Cavalier King Charles Spaniel (bred to warm laps) and the Poodle (bred to work closely with handlers). The result is a dog that often tolerate being alone. Owners frequently report panic barking, destructive chewing, and house soiling when left for even short periods (1-2 hours). If you work away from home 8 hours a day, this breed is likely incompatible with your lifestyle without expensive daycare.

challengeThe "Doodle" Coat Nightmare

The "low maintenance" promise is a myth. The mix of Poodle curls and Cavalier silk often creates a coat that mats near the skin if not brushed thoroughly (line-brushed) 3-4 times a week. Many owners underestimate this, leading to "shave-downs" at the groomer due to painful matting.

challengeHouse Training Difficulty

Small bladders combined with a sensitive nature can make house training take longer than average. They do not respond well to harsh correction and may "regress" during adolescence.

Multi-Species Compatibility

SpeciesBullmastiffCavapoo
With CatsGenerally safe with proper introductionGenerally safe with proper introduction
Small MammalsSupervision requiredSupervision required
Birds / ReptilesCaution advisedCaution advised

Advanced Behavior

TraitBullmastiffCavapoo
Predatory Sequence RiskMediumMedium
BiddabilityLowHigh
Noise SensitivityLowLow
Territorial Barking
Same-Sex Aggression Onset18 months18 months

First Year & Life Stages

First Year Challenges

ChallengeBullmastiffCavapoo
Puppy Difficulty
Destructive Phase6-186-12
House TrainingModerateModerate
Crate TrainingMediumMedium
Adolescent Regression

Bullmastiff: Bullmastiff puppies require consistent training and patience.

Cavapoo: Cavapoo puppies require consistent training and patience.

Life Stages Timeline

StageBullmastiffCavapoo
Puppy Phase12 months12 months
Adolescence6-186-18
Adult Years2-82-8
Senior Onset~8 years~8 years
Peak Energy Age1-3 years1-3 years

Size & Physical Characteristics

Physical Stats

MeasurementBullmastiffCavapoo
HeightN/AN/A
WeightNot enough data yetNot enough data yet
Size CategoryExtra LargeMedium
Lifespan

7–9 years

10–12 years

Litter Size4-84-8

Bullmastiff Coat

Type double
Length Medium
Texture straight
Colors
Various

Cavapoo Coat

Type double
Length Medium
Texture straight
Colors
Various

Lineage & Origin

DetailBullmastiffCavapoo
Original PurposeDeveloped in mid-19th century England, the Bullmastiff was created by gamekeepers to combat poachers* Poodle: Originally a German water retriever
OriginN/AN/A

Breeding Details

DetailBullmastiffCavapoo
C-Section RateVariesVaries
Whelping DifficultyMediumMedium
Puppy Mortality RateLowLow

Physical Risks

RiskBullmastiffCavapoo
Bloat / GDV RiskLowLow
Slippery Floor RiskLowLow
Min Fence Height1.5m1.5m
Dig / Escape RiskLowLow

Health & Common Conditions

Bullmastiff Health Issues

Lymphoma
Hip Dysplasia
Elbow Dysplasia
Gastric Dilatation-VolvulusBloat
Subaortic StenosisSAS

Cavapoo Health Issues

Mitral Valve Disease (MVD): Extremely high prevalence
Syringomyelia (SM) / Chiari-like Malformation: >50% prevalence in Cavaliers
Dental Disease: 12.5% annual prevalence in small breeds
Patellar Luxation: Common in both parent breeds
Progressive Retinal Atrophy (PRA): Genetic carrier status common in Poodles

Bullmastiff Suggested Tests

  • OFA/PennHIP for hip/elbow dysplasia
  • Echocardiogram for cardiac issues
  • CERF for eye conditions
  • Prophylactic gastropexy

Cavapoo Suggested Tests

  • OFA Heart evaluation (parents annually)
  • MRI screening (parents)
  • DNA testing for PRA (parents)
  • Regular dental check-ups

Health Risk Overview

Risk FactorBullmastiffCavapoo
Cancer RiskMediumMedium
Cardiac RiskLowLow
Neurological RiskLowLow
CCL/ACL Tear RiskLowLow
Vet Burden TierMediumMedium

Sensitivities & Allergies

SensitivityBullmastiffCavapoo
Skin Allergies
Environmental Allergies
Stomach SensitivityLowLow
Food Allergies

Health Maintenance

Care ItemBullmastiffCavapoo
Nail Growth RateNormalNormal
Eye Care NeedsLowLow
Anal Gland IssuesOccasionalOccasional

Senior Care & Aging

Bullmastiff Senior Care

Common Senior Issues

  • Arthritis
  • Vision decline
  • Cognitive changes
Mobility Aid LikelihoodMedium
QoL Decline Age~10 years
End of Life ComplexityMedium

Senior care varies by individual health.

Cavapoo Senior Care

Common Senior Issues

  • Arthritis
  • Vision decline
  • Cognitive changes
Mobility Aid LikelihoodMedium
QoL Decline Age~10 years
End of Life ComplexityMedium

Senior care varies by individual health.

Grooming & Care

Bullmastiff

medium maintenance
Coat Typedouble
Coat Lengthmedium
Coat Texturestraight
Shedding LevelMedium
Seasonal SheddingMedium
Ear Cleaningweekly
Dental RiskMedium
Obesity Prone
Winter Gear Needed
Summer Restrictions
Paw Protection
Odor LevelModerate
Tactile FeelVaries by coat type
Colors
Various

Cavapoo

high maintenance
Coat Typedouble
Coat Lengthmedium
Coat Texturestraight
Shedding LevelLow
Seasonal SheddingLow
Ear Cleaningweekly
Dental RiskMedium
Obesity Prone
Winter Gear Needed
Summer Restrictions
Paw Protection
Odor LevelModerate
Tactile FeelVaries by coat type
Colors
Various

Lifestyle Compatibility

Bullmastiff Daily Life

Exercise Needs30-45 min/day
Alone TimeUp to 4h
Mental StimulationMedium
ApartmentChallenging - needs space
Work from HomeSuitable with adequate exercise
Weekend WarriorSuitable
HousingYard
Barking LevelLow
First-Time Owner
Exercise Types
WalkingPlayTraining
NighttimeSleeps well when exercised
Food MotivationMedium

Cavapoo Daily Life

Exercise Needs60-90 min/day
Alone TimeUp to 4h
Mental StimulationMedium
ApartmentSuitable
Work from HomeSuitable with adequate exercise
Weekend WarriorSuitable
HousingApartment
Barking LevelMedium
First-Time Owner
Exercise Types
WalkingPlayTraining
NighttimeSleeps well when exercised
Food MotivationMedium

Housing & Legal Restrictions

RestrictionBullmastiffCavapoo
BSL Restricted
Common Rental Ban
Insurance Blacklist
Weight CategoryUnder 50lbsUnder 50lbs

Climate Tolerance

ClimateBullmastiffCavapoo
Heat Tolerance
Cold Tolerance
Water AffinityMediumMedium

Travel Compatibility

ActivityBullmastiffCavapoo
Car TravelGoodGood
Camping
Beach Friendly
Hiking Rating
Cabin Flight Eligible
Hotel Friendly Size

Niche Suitability

RoleBullmastiffCavapoo
Service DogLowHigh
Therapy DogLowLow
Deep Pressure Therapy
Canicross / Bikejoring
Apartment Adaptable
Tactile / Sensory Friendly
Livestock Guardian
Medical AlertLowLow

Costs & Expenses

Upfront Costs

CostBullmastiffCavapoo
Purchase PriceN/AN/A
Initial Cost Range$1,000–$2,500$1,000–$2,500
Cost Tier

Ongoing Costs

CostBullmastiffCavapoo
Monthly Range$180–$300$450–$900
Yearly Range$2,160–$3,600$5,400–$10,800
Food / Month$100-150N/A
Insurance / Month$80-150$400-800
Grooming / SessionN/A$50-100
Vet Routine / Year$500-800N/A
Monthly Cost Tier

Bullmastiff Lifetime Cost

N/A

Cavapoo Lifetime Cost

N/A

Quirks & Fun Facts

Daily Quirks

QuirkBullmastiffCavapoo
Snoring
FlatulenceOccasionalOccasional
Slobber LevelLowLow
Smell When WetModerateModerate
Zoomies FrequencyOccasionalOccasional
Counter Surfing
Digging TendencyLowLow

Frequently Asked Questions

Yes, Bullmastiffs can make good family dogs with proper training and socialization. They form strong bonds with their family members.
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Compare with Other Breeds

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