In King Canutes Forest laws there was a special mention of
Mastiff dogs. The law stated that all mastiffs had to have their
middle toes removed so that they could not run fast enough to hunt
deer - which were, at the time protected by royalty.
British royals kept Mastiffs to protect their estates, releasing
them into the gardens at night to deter intruders. Henry VIII is
said to have given a Mastiff to Charles V of Spain.
Mastiffs have also been popular for bear-baiting. This "sport,"
in which dogs attacked chained-up bears, bulls, and sometimes
tigers, was especially popular during the time of Queen
Elizabeth.
The Mastiff was sometimes known the "Butcher's Dog." Their large
appitite made it an impractical pet for anybody who did not have a
cheap supply of meat available.
The first Mastiff was brought from Britain to the United States
on the Mayflower. The breed didn't gain popularity there until the
1800s, when Mastiffs were frequently used as property guards on
plantations.
During both the World Wars, Mastiffs were used to pull
ammunition carts at the front lines. However, their popularity due
to the amount of food they needed each day. By the late 920s,
Mastiffs were close to extinction in Britain, and by the end of
World War II, Canada and America sent Mastiffs back to Britain to
save the breed. Now, the Mastiffs are well-established in both
continents.