Bullmastiff
VS
Australian Shepherd
Bullmastiff vs Australian Shepherd
Compare Bullmastiff and Australian Shepherd 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
Bullmastiff
Australian Shepherd
Breed type
Purebred
Purebred
Height
61 – 69 cm
46 – 58 cm
Weight
41 – 59 kg
14 – 29 kg
Life expectancy
8 – 10 years
13 – 16 years
Child friendly
5/5
3/5
Energy level
3/5
3/5
Intelligence
3/5
3/5
Trainability
2/5
4/5
Health
3/5
4/5
Grooming needs
2/5
4/5
Shedding
3/5
3/5
Barking level
3/5
4/5
Aggressiveness
4/5
3/5
Characteristics
Bullmastiff
Great with kids
Low grooming
Protective
Stubborn
Giant
Australian Shepherd
Easy to train
Medium
Summary
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.
About Australian Shepherd
The Australian Shepherd is a medium, athletic herding dog, highly intelligent and energetic. Loyal and people oriented, it bonds closely and needs substantial daily exercise, training, and mental work. Its striking, weather resistant coat and varied eye colors add to its appeal.
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