Heifer raising is the second largest expenditure in a farm after the milking herd, with feed costs takes the largest share. The aim should be to rear heifers to reach the desired body weight early so that they initiate puberty, establish pregnancy, and calve easily. When feeding heifers, the farmer should aim to: i) Reduce interval between weaning and first lactation. This will increase number of calvings per lifetime (more of lactations) and lead to faster genetic improvement. ii) Minimise mortality. iii) Achieve a growth rate of 0.5-0.7 kg/d. iv) Achieve first calving at 22 to 24 months of age v) Feeding management must ensure that heifers reach target live weights for breeding at 14-16 months of age. Combining both adequate development and early age at calving has several advantages: i) It decreases the risk of calving difficulty. ii) It improves lifetime milk production (days in lactation and milk production per day in lactation). iii) It reduces rearing costs (feed, labour, etc.);...