I have a pit bull and a lab. I can tell you from experience some dogs, like people, a more aggressive than others, but the root of all, like people, is what their individual experiences have been and how they were raised. FYI there have been pit bulls that are certified as service dogs. What I would advise anyone with ANY large breed dog is to put in the time to train it properly. My kids love our dogs but I consistently have told them "Never forget that the dog is an animal". I teach them to enjoy the dogs but also respect them and know how to read the body language of a dog. In this case, the owner should be held responsible. RIP to the child that died in such a horrible way. I wish we had much more responsible dog owners.