The Old English Mastiff is a massive dog. The Mastiff has a large, heavy, square head with a well-marked stop between the eyes. The muzzle should be half the length of the skull. The medium-sized brown to dark hazel eyes are set wide apart with a black mask around them. The nose is dark in color.
Mastiffs are inclined to be lazy but they will keep fitter and happier if given regular exercise. Like all dogs, the American Mastiff should be taken on daily regular walks to help release its mental and physical energy. It’s in a dog’s nature to walk. While out on the walk the dog must be made to heel beside or behind the person holding the lead, as in a dog’s mind the leader leads the way, and that leader needs to be the human. They should always be leashed in public.