Neapolitan Mastiff is a giant dog, in fact it is one of the biggest breeds in terms of size. They fall under the class of Working Group of Dogs. The main characteristics of this dog is its size, wrinkled face and loose skin. Having been termed as a giant means it can grow up to 70 kgs in weight. They are difficult to train and needs an experienced owner. They are highly protective of its human family thus very affectionate. One aspect to be kept in mind is that it drools heavily, how every they bark and howl very less. This breed requires average exercise, but lack of exercise can make them bored.. Neapolitan is unsuitable for Apartments.