Humaneness check, Put collar to your own neck, set to lowest level and administer a shock, it is very slight. Then slowly ramp it up to the highest level, now the question is if you were a dog where would you stop barking/pay attention at? What im trying to say is even the highest level isnt going to kill you or permanantly injure you. Lets just compare it to a police grade tazer. it takes 50,000 volts of electricity to arc across the two electrodes, but once the electrodes have attached to the skin only 11,000 volts are going through the body. If the taser has been deemed humane, a shock collar sure as hell is.