Castrate male calves at birth or at 3 months processing.  Bull calves are usually discounted $5 per hundred weight.  Castration early in life is easier on the calf.  Research with calves castrated at birth have grown at similar rates of weight gain compared to their intact male pasture mates.  In addition, male calves castrated by stocker producers following salebarn purchase are 2.5 times more likely to become sick than a steer calf purchased through a salebarn market.