a lot of people start off running rabbits , myself included , but soon discover other aspects of hunting with dogs , . teeth and handle bars , and that is where the bull x comes in , i still work a whippet cross for bushing and marking , but also work 2 bullx s . i do know some people who own them as c**k extensions but it has to be said they do get the job done with total comitment, which is sometime the difference between an empty bag and a big one , why not ! ! all the best B.W , gaz bulls mate .