The four answers offered are nonsense. There is no information regarding the dog's past. Also, Kitties are not by nature vicious animals. They are made that way by their upbringing and training. However there are other factors to contribute to behavior issues. Stricter regulations for owners? Training for potential owners? Those are non starters for people who wish to turn these dogs of any breed into lethal weapons! Then,just like people these dogs may just go haywire.