I-Mastiff yinja enkulu, enkulu, elinganayo kunye nomgaqo-siseko owakhiwe kakuhle. Ukubonakaliswa kobukhulu kunye nesidima kuyadalwa.
Umlingiswa we-mastiff yanamhlanje yahluke ngokuphawulekayo kumoya wobundlobongela ookhokho bayo abasondeleyo: ithembekile, ithembekile, kwaye inobungangamsha. Le nja ikude nochuku. Uqeqesho luyafuneka kuba ubukhulu benja bufuna ulawulo. Umlindi, inja yeqabane.
Inzala yeMastiff inengqondo ebukhali, ngenxa yokuba iqonda kakuhle umnini kunye neemfuno zakhe. Ukuba ufuna ukumqeqeshela ukukhusela okanye ukukhuselwa, ngoko kubalulekile ukufumana kwinja, ubukhulu obunjalo kunye namandla, ukuthobela ngokupheleleyo ngamanye amaxesha akulula.