Many fans of pitbulls will argue that it is not the dog, but the owners that cause them to be like this. Actually, it is not. These dogs were actually created and bred to do one thing: KILL. Hence the name "Pit Bull". They were bred to be pit fighters. It is in their blood to fight and be violent. They are built for it physically from their stance, height and even jaw muscles. Yes, many can be trained and raised to NOT be like this, but genetically they are very predisposed to have a short fuse and kill something in a short amount of time.