Bullmastiff
VS
Miniature American Shepherd
Bullmastiff vs Miniature American Shepherd
Compare Bullmastiff and Miniature American 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
Miniature American Shepherd
Breed type
Purebred
Purebred
Height
61 – 69 cm
33 – 46 cm
Weight
41 – 59 kg
9 – 14 kg
Life expectancy
8 – 10 years
11 – 14 years
Child friendly
5/5
4/5
Energy level
3/5
4/5
Intelligence
3/5
4/5
Trainability
2/5
3/5
Health
3/5
3/5
Grooming needs
2/5
4/5
Shedding
3/5
3/5
Barking level
3/5
4/5
Aggressiveness
4/5
3/5
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Characteristics
Bullmastiff
Great with kids
Low grooming
Protective
Stubborn
Giant
Miniature American Shepherd
Great with kids
High energy
Super smart
Small
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 Miniature American Shepherd
Compact, athletic herding dog bred in the U.S. as a smaller Australian Shepherd. Intelligent, devoted, and “velcro” with family, often reserved with strangers. Needs regular training, mental work, and exercise. Medium double coat in varied colors; generally healthy with 12–15 year lifespan.
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