Jack Russell Terrier
VS
Pyrenean Mastiff
Jack Russell Terrier vs Pyrenean Mastiff
Compare Jack Russell Terrier and Pyrenean Mastiff 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
Jack Russell Terrier
Pyrenean Mastiff
Breed type
Purebred
Purebred
Height
25 – 30 cm
71 – 78 cm
Weight
5 – 6 kg
75 – 81 kg
Life expectancy
13 – 16 years
11 – 13 years
Child friendly
5/5
4/5
Energy level
5/5
3/5
Intelligence
5/5
3/5
Trainability
5/5
3/5
Health
4/5
3/5
Grooming needs
2/5
3/5
Shedding
3/5
3/5
Barking level
5/5
3/5
Aggressiveness
3/5
3/5
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Characteristics
Jack Russell Terrier
Great with kids
High energy
Super smart
Low grooming
Easy to train
Tiny
Pyrenean Mastiff
Great with kids
Giant
Summary
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.
About Pyrenean Mastiff
Large Spanish livestock guardian, the Pyrenean Mastiff is a giant, steady dog with a dense white coat and dark patches. Calm, observant and deeply loyal, it’s affectionate with family yet reserved with strangers, needing space, firm but gentle training, and experienced ownership.
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