I band all my bull calves at 1 or 2 days old if I can catch them and the moma isn't to ornery. My question applies to calves 300 lbs or more. Neither of my banders works for that size. When I was younger I watched a vet castrate with a knife. He cut through the bottom of the sac and then slowly pulled each one out cord and all. This is the way I have continued to do it for several years. I've been told recently that this can cause them to bleed to death internally. Whats the best method.