I-Mastiff iyisilwane esihloniphekile kodwa esinobuntu obuhle. Unothando nothando ngomndeni wakhe, futhi umoya wakhe ozolile umenza umngane omuhle wezingane ezindala. Kodwa-ke, lolu hlobo alunconyelwe izingane ezisacathula ngenxa yobukhulu balo.
I-mastiff ingase ibe isilwane esifuywayo esihloniphekile, esinothando, kodwa ukuqapha kwayo ngentshiseko kudinga ukulinganisela ngokuzijwayeza nokuqeqeshwa kokulalela. Kuphoqelekile ukwethula i-Mastiff kubantu abaningi abasha, izindawo, nezimo ngangokunokwenzeka, ikakhulukazi ngesikhathi seshede lomdlwane.