Neapolitan Mastiff
VS
Sealyham Terrier
Neapolitan Mastiff vs Sealyham Terrier
Compare Neapolitan 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
Neapolitan Mastiff
Sealyham Terrier
Breed type
Purebred
Purebred
Height
60 – 73 cm
30 – 31 cm
Weight
50 – 70 kg
8 – 9 kg
Life expectancy
8 – 10 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
2/5
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
Neapolitan Mastiff
Great with kids
Giant
Sealyham Terrier
Great with kids
High energy
Super smart
Small
Summary
About Neapolitan Mastiff
Ancient Italian giant guardian with massive build and heavy wrinkles. Calm and affectionate with family, wary of strangers, and protective by nature. Needs early training, steady leadership, moderate daily walks, and careful skin and drool care due to size and loose folds.
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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