A good Mastino is where you find it !!! They ALL have something in the tank . Just depends on what you want & knowing where to look . Look to those breeders that actually TEST ( Health & Temp ) & ARE NOT AFRAID to lay it on the line.....Also remember Mastini should look like Mastini NOT SHAR-PEIs or Big Blue PITs .....Everything should be held in BALANCE.....Type , Health & Ability should be held EQUALLY :!: :!: