Bullmastiff vs Irish Water Spaniel
Compare Bullmastiff 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
Bullmastiff
Irish Water Spaniel
Breed type
Purebred
Purebred
Height
61 – 69 cm
51 – 61 cm
Weight
41 – 59 kg
25 – 34 kg
Life expectancy
8 – 10 years
12 – 14 years
Child friendly
5/5
5/5
Energy level
3/5
4/5
Intelligence
3/5
4/5
Trainability
2/5
4/5
Health
3/5
3/5
Grooming needs
2/5
3/5
Shedding
3/5
2/5
Barking level
3/5
0/5
Aggressiveness
4/5
0/5
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Characteristics
Bullmastiff
Great with kids
Low grooming
Protective
Stubborn
Giant
Irish Water Spaniel
Great with kids
High energy
Super smart
Quiet
Easy to train
Large
Summary
About Bullmastiff
Large, powerful guardian originally bred to catch poachers, the Bullmastiff is calm, confident and deeply loyal, often bonding closely with one person. It has a short, low‑maintenance coat, needs space, consistent early training and socialisation to guide its natural protectiveness.
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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