This chapter first traces the origin and development of bullying among prisoners, with first study having been published in 1996, followed by 27 more between 1999 and 2007. The DIPC SCALED is a multiple-indicator method of assessing bullying behaviour which requires respondents to indicate the frequency at which the perpetration/victimization has occurred. Although conclusions can be reliably drawn in relation to the nature and extent of bullying, further work is required before definite conclusions can be drawn; the chapter presents four areas in this direction. There are a number of clear applications that can be drawn from the acquired knowledge on prison bullying. Some examples of how the research findings/theoretical models can be applied in practice are listed in the chapter. Interventions managing prisoner bullying need to attend to the empirical literature and theory base. Ill-informed intervention approaches beyond the expectations of the existing literature need to be avoided.