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Guarding dog

Bullmastiff

A large, powerful guardian with close family bonds and a need for safe handling.

Size: LargeActivity: HighGrooming: Low

At a glance

Size
Large
Height at shoulder
61–69 cm
Weight
41–59 kg
Lifespan
under 10 years
Activity
High
Grooming
Low
Training
Demanding activities
Owner experience
Experience recommended

Powerful, devoted and watchful

Bullmastiffs can be gentle with their family yet alert around unfamiliar people. Their size makes early, positive training essential.

Everyday life

Plan controlled activity, lead training and thoughtful socialisation. They need room and may not suit unsupervised contact with small pets.

When you need to go out

Being alone needs gradual practice. The RSPCA advises no more than four hours at a time; puppies and some adults need much shorter intervals. Arrange company during longer absences.

Day-to-day care

Brush the short coat weekly. Keep facial folds clean and dry and expect some drooling.

Size and build

Measurements describe adult dogs and are a guide. Lines and individuals can vary; ask about the parents’ health, temperament and daily life.

Health

PDSA lists gastric dilatation-volvulus, hip and elbow dysplasia, BOAS, skin and eye problems, and cancer. Ask about relevant screening and emergency planning.

Could this breed fit your life?

Could work well if …

  • You have experience with large, powerful and watchful dogs.
  • You can provide space, early training and reliable company.

May be more difficult if …

  • Young children or pets would lack safe separation at home.
  • The dog would regularly be alone for many hours.

Breed traits describe tendencies. Breeding line, socialisation, care and experience shape the individual. Children and animals always need responsible supervision.

Similar needs, different dogs.

Selected by shared size, activity, grooming and training characteristics.

Working dog

Rottweiler

Largeover 10 years

A large, powerful working dog that needs consistent training and experienced handling. Size and protective behaviour call for care in daily life.

Working and guarding dog

Dobermann

Largeover 10 years

Athletic, alert and closely bonded to its family. A Dobermann needs plenty of exercise and regular training, while its short coat requires little grooming.

Working dog

Great Dane

Largeunder 10 years

Exceptionally tall and usually short-coated, with substantial space and handling needs. Even a gentle dog can knock people over by accident.

Sources and photograph credit

  1. Teaching your dog to be left alone
  2. Bullmastiff · breed guide