The Guinness Book of Records recognises a Mastiff by the name of Zorba as the world’s biggest dog, weighing in at a hefty 343lbs.
Mastiff adult in black and white

About the Mastiff

Character-wise, Mastiffs are a rare combination of nobility and courage. These calm dogs are affectionate with their human companions, and despite their size are known to be gentle with children.

Mastiffs are powerful, well-built dogs who have even been known to outweigh fully grown men. They are used across the world as security and watchdogs thanks to their alert, protective nature and formidable appearance.

Source: key facts and characteristics sourced from Fédération Cynologique Internationale (FCI)

Breed specifics

Country: United Kingdom
Size category: Very large
Avg life expectancy: 10-12 years
Loving / Calm / Protective / Reserved

Key facts

Makes a great guard dog
Needs an owner with some experience
Training should start early
Dachshund puppy in black and white eating from a red bowl

A healthy start to life

Puppyhood is a time of massive physical and behavioural change, and a steep learning curve for new owners. Find out how you can provide your puppy with the best start to life so they develop into strong, healthy dogs. 

Lifetime of health

Get advice and information on how to provide the best care for your dog at every stage of life.

Like & share this page