Pioneer - Pre-shipment cattle and weaned calves under 400 lbs. - 1/2 oz. bolus; over 400 lbs. - 1 1/2 oz. bolus. Newborn calves 1/2 oz. bolus, incoming feeder lambs1/4 oz. bolus, veal calves 1/4 oz. bolus as soon as possible. Dairy cows at freshening three 1/2 oz. boluses.