Mastiff
VS
Irish Water Spaniel
Mastiff vs Irish Water Spaniel
Compare Mastiff and Irish Water Spaniel 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
Irish Water Spaniel
Breed type
Purebred
Purebred
Height
70 – 91 cm
51 – 61 cm
Weight
75 – 110 kg
25 – 34 kg
Life expectancy
10 – 12 years
12 – 14 years
Child friendly
3/5
5/5
Energy level
3/5
4/5
Intelligence
4/5
4/5
Trainability
3/5
4/5
Health
2/5
3/5
Grooming needs
3/5
3/5
Shedding
3/5
2/5
Barking level
3/5
0/5
Aggressiveness
2/5
0/5
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Characteristics
Mastiff
Super smart
Giant
Irish Water Spaniel
Great with kids
High energy
Super smart
Quiet
Easy to train
Large
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 Irish Water Spaniel
Medium–large, athletic gundog with a distinctive curly liver coat, smooth face and tapering “rat tail.” Clever, water‑loving retriever that forms close bonds, often to one person. Needs substantial daily exercise, mental work, regular grooming and kind, consistent training.
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