Newberry Castrating Knife Stainless steel will split the scrotum for easier removal of testicles.,Surgical castration is preferred. A correctly surgically castrated calf will have less depression of weight gains and a lower incidence of infections than calves castrated by other methods.Most importantly, a surgically castrated calf is almost certainly completely castrated. Calves castrated by other methods are often cause some serious infection problems These facts make surgical castration the procedure of choice.