Early separation of dairy calves from their mothers and subsequent isolation housing causes documented welfare harm from social deprivation and separation distress.
The separation of dairy calves from their mothers causes acute and prolonged distress. Cows and calves vocalize extensively for days after separation, showing behaviors consistent with grief and searching. Isolated calves show higher stress hormone levels and develop abnormal oral behaviors. Calves housed alone show impaired learning and cognitive development compared to socially housed animals. Early weaning onto milk replacer rather than whole milk and early solid feed transition can cause nutritional stress. The welfare impact of routine mother-calf separation is one of the most significant ongoing welfare issues in dairy farming.