Dairy replacement heifers reared in individual hutches during the first weeks of life are denied social contact during a critical developmental window with lasting behavioral and welfare consequences.
Individual hutch rearing deprives dairy calves of social contact during the developmental period when social learning and relationship formation are most critical. The behavioral deficits from early social isolation — reduced social competence, higher fearfulness, and impaired learning — persist into adult life and affect welfare throughout the animals productive lifespan. The scientific case for pair and group rearing from birth is strong, and transition has been shown to be achievable without health or production disadvantages. The barrier is management habit rather than genuine economic constraint.