Mastiff
VS
Jack Russell Terrier
Mastiff vs Jack Russell Terrier
Compare Mastiff and Jack Russell Terrier 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
Mastiff
Jack Russell Terrier
Breed type
Purebred
Purebred
Height
70 – 91 cm
25 – 30 cm
Weight
75 – 110 kg
5 – 6 kg
Life expectancy
10 – 12 years
13 – 16 years
Child friendly
3/5
5/5
Energy level
3/5
5/5
Intelligence
4/5
5/5
Trainability
3/5
5/5
Health
2/5
4/5
Grooming needs
3/5
2/5
Shedding
3/5
3/5
Barking level
3/5
5/5
Aggressiveness
2/5
3/5
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Characteristics
Mastiff
Super smart
Giant
Jack Russell Terrier
Great with kids
High energy
Super smart
Low grooming
Easy to train
Tiny
Summary
About Mastiff
The Mastiff is a giant, heavily built guardian dog, calm and dignified yet deeply devoted to its family. It is watchful rather than aggressive, needs gentle, consistent training, moderate exercise, and space. Its short coat is easy to maintain, but drool, health care, and costs are significant.
About Jack Russell Terrier
Jack Russell Terrier: small, sturdy, energetic fox-hunting terrier with bold, intelligent nature. Needs 1–2 hours of daily exercise plus mental work. Predominantly white, three coat types, strong digging and prey drive. Affectionate with family but demanding and unsuited to very sedentary homes.
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