The welfare of replacement dairy heifers during rearing profoundly affects their lifetime productivity and welfare as adult cows, making early life investment a welfare and economic priority.
Dairy heifer welfare during the rearing period is both directly significant — calves and heifers experience pain, disease, and deprivation that matter intrinsically — and instrumentally significant, as early life welfare affects lifetime productivity and adult welfare. Calves that experience chronic disease, pain from unmanaged procedures, or social deprivation during rearing grow into cows with compromised immune function, reduced fertility, and shorter productive lives. The economic and welfare cases for investing in heifer welfare are aligned in dairy production in ways they sometimes are not in beef or pig farming. Key interventions include pain management for all procedures, appropriate group housing that allows social development, good disease management, and nutrition that supports healthy growth without metabolic compromise. These investments typically pay back through improved lifetime performance.