Early weaning causes significant stress in piglets. Understanding the welfare impacts helps identify management approaches that reduce suffering at this critical transition.
Weaning represents one of the most acute welfare challenges in pig production. The simultaneous nature of the transition — removal from mother, mixing with unfamiliar piglets, change of diet, and change of environment — overwhelms the piglet's coping capacity and causes measurable distress through vocalisation, reduced feeding, weight loss, and immune compromise. The post-weaning period is associated with some of the highest piglet mortality in the production cycle. Later weaning age dramatically reduces the severity of this welfare impact, but is economically disadvantageous in intensive systems that prioritise sow productivity. The trade-off between sow reproductive efficiency and piglet welfare at weaning is a genuine ethical question that higher welfare standards begin to address by requiring minimum weaning ages.