We have two steers and one heifer up that we are getting ready for our show season (Fall & Winter). One of the steers and the heifer have a significant number of warts on their face and necks. Over the years I have tried pulling them off and even feeding some of them back. The theroy is to help build up an immunity to the virus causing the warts. I don't know if this ever helped or if it was the actual pulling off that worked. As you can see this method has a tendancy to traumitize the calf and sems a bit inhumane. I have never used the vaccine before but have heard that it is essentially uneffective. Is this true and if so is there other more humane methods of eliminating warts?