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Collie
VS
Bullmastiff
Collie vs Bullmastiff
Compare Collie and Bullmastiff side by side and get a clear picture of what sets the breeds apart. Explore differences in size, weight, temperament, activity level, and other key traits to more easily decide which breed best fits your lifestyle and circumstances.
Characteristic
Collie
Bullmastiff
Breed type
Purebred
Purebred
Height
51 – 61 cm
61 – 69 cm
Weight
16 – 34 kg
41 – 59 kg
Life expectancy
14 – 16 years
8 – 10 years
Child friendly
5/5
5/5
Energy level
5/5
3/5
Intelligence
5/5
3/5
Trainability
5/5
2/5
Health
4/5
3/5
Grooming needs
3/5
2/5
Shedding
5/5
3/5
Barking level
4/5
3/5
Aggressiveness
1/5
4/5
Characteristics
Collie
Great with kids
High energy
Super smart
Easy to train
Large
Bullmastiff
Great with kids
Low grooming
Protective
Stubborn
Giant
Summary
About Collie
The Collie is an intelligent, medium‑large herding dog with a long double coat needing regular grooming. Gentle, loyal, and sensitive, it bonds closely with family and prefers kind training. Adaptable to town or country, it needs daily mental stimulation and exercise to stay content.
About Bullmastiff
Large, powerful guardian originally bred to catch poachers, the Bullmastiff is calm, confident and deeply loyal, often bonding closely with one person. It has a short, low‑maintenance coat, needs space, consistent early training and socialisation to guide its natural protectiveness.
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