The welfare of dairy replacement heifers during their first two years of life has profound implications for their health, productivity, and welfare throughout their time in the milking herd.
Heifer rearing practices that prioritize rapid early weaning and minimal social interaction produce animals that enter the milking herd compromised in health, immune function, and human-animal relationships. Early weaned calves show elevated stress indicators, reduced cognitive development, and impaired ability to benefit from social learning. Extended milk feeding and social group housing restore developmental opportunities that improve lifetime welfare and productivity simultaneously. The welfare of the future milking cow is shaped substantially by experiences in the first months of life. Investment in heifer welfare through extended milk feeding, social housing, and disease prevention produces dividends in reduced veterinary costs and longer productive lives.