[quote1327674749=Hugo] German Shepherd Dog, Dogo Argentino, NEO, Fila Brasileiro, English Mastiff, CAO and CO. hugo [/quote1327674749] Apart from the German Shepherd, you had moloss (Dogo A., Fila B., NEO, Engliah M.) end shepherd (CAO and CO), what are the major differences between these two groups in character? If some of them have lived together, how they behaved?