Great Dane vs English Mastiff

Side-by-side comparison of two popular breeds — temperament, exercise, grooming, lifespan and common health issues. Use it to decide which breed fits your home.

Great Dane vs English Mastiff — at a glance

The Great Dane (50–82 kg, 7–10 years) and the English Mastiff (54–104 kg, 6–10 years) sit in different — or sometimes overlapping — corners of dog ownership. Here's how they really compare for an everyday Irish or UK family.

Both breeds have similar energy demands — Great Dane tips slightly higher but neither is a couch dog.

Both have manageable grooming routines — the English Mastiff demands slightly more, but neither needs daily fuss.

Insurance premiums for breeds with brachycephalic, joint or cancer predispositions run 20–40% above average — check before you commit. We have a free quote calculator here.

	Great Dane	English Mastiff
Group	Working	Working
Origin	Germany	England
Weight	50–82 kg	54–104 kg
Height	76–86 cm	70–84 cm
Lifespan	7–10 years	6–10 years
Energy level
Trainability
Grooming needs
Good with kids
Good with other pets
Hypoallergenic
Watchdog instinct
Novice-owner OK

Great Dane

Temperament

Friendly, patient, dependable. Great Danes are usually gentle with children and sociable with other dogs and pets. They tend to be "leaners" — physically affectionate with their humans.

Exercise

60 minutes a day of moderate exercise. Avoid impact in puppies under 18 months — long walks and jumping can damage developing joints.

Grooming

Short coat, weekly brush. Bathing every 6–8 weeks.

Health

Bloat / GDV (the #1 cause of death — feed twice daily, slow feeders, never exercise around meals). Cardiomyopathy. Hip dysplasia. Wobbler syndrome. Bone cancer (osteosarcoma). Lifespan tragically short — 7–10 years.

Full Great Dane profile →

English Mastiff

Temperament

Calm, affectionate, dignified, protective. Mastiffs are famously good with children of their own family. Wary of strangers but rarely aggressive — they tend to body-block rather than attack.

Exercise

30–45 minutes a day of moderate walking. Heavy-bodied breeds shouldn't jog or run on hard surfaces. Puppies must avoid impact until 18 months+.

Grooming

Short coat, weekly brush. Drool prevention bibs help.

Health

Bloat / GDV. Hip / elbow dysplasia. Cardiomyopathy. Cancers (lymphoma, osteosarcoma). Eye conditions. Lifespan 6–10 years.

Full English Mastiff profile →

Which is right for you?

Pick the Great Dane if

Calm families with space, owners who can budget for giant-breed food and vet care.

Pick the English Mastiff if

Calm households with space, owners who can budget for giant-breed care.

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