Well it really depends on the type of bully. But for those where there is a connection between bullying and home life it's because bullying is a form of interaction with others and home life is usually where we are taught how to interact with others. So if the home life is bad then by natural course we mirror that in our interactions with others. The only thing you need to do is ensure the child is positively reinforced for negative behavior this ensures their development of the a-typical ?conscience? is impaired and that they will have no mental restraint in regards to harming others and if done properly will in fact revel in such activity.