The Bloodless Castrators applies a latex ring/band around the scrotum, cutting off the blood supply. The scrotum should fall off in 20-40 days. Works best on calves 350 lbs. and up. A tetanus toxoid injection should be given at time of Castration. Tetanus toxoid (Covexin 8, Bar Vac CD-T, Vision C & D Tetanus Toxoid or Ovine Tetanus Shield) should be administered when bands are applied.