The welfare of dairy heifer calves during rearing profoundly affects their lifetime productivity, health, and behavioral development, yet early-life welfare in the dairy sector has historically received insufficient attention.
Early life in dairy calves is a critical welfare period with lasting consequences. The distress of maternal separation is acute and measurable — cortisol surges, vocalizations, reduced milk intake, and activity changes in both cows and calves document genuine suffering at separation. Calves reared in individual hutches cannot form the social bonds that are essential to their nature as herd animals, and emerge from the pre-weaning period with fearful, solitary behavioral profiles that affect their entire lives. The contrast with calves raised in social groups with access to teat feeding is dramatic — better health, better cognitive development, and better long-term production performance. Early welfare investment in dairy heifer rearing pays returns throughout the productive life.