A Giant Dog  breed is any of many dog breeds whose height and weight put them
at the largest end of all dog breeds. There is no universal height or weight at which
a breed is classified as a giant breed; any very large dogs fall into this category,
although some groups "giant breed"  based on a certain height or weight, such as
100 pounds. Giant breeds grow rapidly, but take longer to mature into their full adult
sizes than smaller dogs.