Pyrenean Mastiff
VS
Sealyham Terrier
Pyrenean Mastiff vs Sealyham Terrier
Compare Pyrenean Mastiff and Sealyham 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
Pyrenean Mastiff
Sealyham Terrier
Breed type
Purebred
Purebred
Height
71 – 78 cm
30 – 31 cm
Weight
75 – 81 kg
8 – 9 kg
Life expectancy
11 – 13 years
12 – 14 years
Child friendly
4/5
4/5
Energy level
3/5
4/5
Intelligence
3/5
4/5
Trainability
3/5
3/5
Health
3/5
4/5
Grooming needs
3/5
3/5
Shedding
3/5
1/5
Barking level
3/5
4/5
Aggressiveness
3/5
2/5
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Characteristics
Pyrenean Mastiff
Great with kids
Giant
Sealyham Terrier
Great with kids
High energy
Super smart
Small
Summary
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.
About Sealyham Terrier
Compact Welsh terrier bred for hunting but affectionate and calm at home. Sturdy, low body with a distinctive white double coat, beard and eyebrows needing regular grooming. Intelligent, independent and moderate in exercise needs, it suits engaged families; the breed is now relatively rare.
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