These dogs are not naturally killers. They were trained, mistreated and conditioned to become that way. It's humans that gave these wonderful loyal dogs a bad reputation. Yes they should have strict rules on owning pitbulls to make sure that they are kept and cared for properly. They are no more aggressive than any other dog. We are the killers. the people treating these dogs to become vicious which is killing this breed. Companionship is what every dog can have.