Heifers are the future of your herd and your long-term success as a dairy producer. Heifer raising makes up 20-25% of the total cost of milk production. A successful pre-weaning calf program has been proven to increase first lactation milk yield by 1,000 lbs – 3,000 lbs. Genetic selection can account for 150 lbs-300 lbs greater milk production per lactation, but pre-weaning management can increase this 5-fold.