My father had bought a pup after our last dog died maybe a year or so ago. Anyways, his girlfriend was taking him on one of his first walks when a random Staff with no owner around attacked him and he died later that night. The Staff ran off after the attack and the owner was never found. Just to let you know im not blaming breed because all dogs are loving creatures when treated right and even those ones can freak out and attack. But no dog should be left unsupervised especially a powerful one like a Staff.