Piglet Weaning Welfare: Management and Stress Reduction

Key Welfare Considerations

• Commercial weaning occurs at 3-4 weeks in most systems, well before the natural weaning age of 12-17 weeks.
• The simultaneous stressors at weaning — separation from sow, novel environment, diet change, and commingling — create acute welfare impacts.
• Post-weaning diarrhoea caused by E. coli is a major welfare emergency exacerbated by weaning stress.
• Weaning anorexia — refusal to eat after separation from sow — causes welfare deterioration through starvation.
• Creep feeding before weaning familiarises piglets with solid feed, reducing post-weaning welfare stress.
• Gradual weaning over several days in some systems reduces acute welfare stress compared to abrupt separation.
• Sow behaviour during weaning affects stress transfer — calm sow removal reduces piglet welfare distress.
• Housing temperature management is critical — weaned piglets are highly susceptible to chilling welfare stress.
• Supplemental heat sources (heat lamps, underfloor heating) provide welfare thermal support post-weaning.
• Social housing in familiar groups post-weaning reduces aggression welfare impacts from commingling.
• Water access must be immediately available — dehydration welfare risk is high in newly weaned piglets.
• Zinc oxide feeding has historically managed post-weaning diarrhoea but is now restricted in EU due to environmental concerns.
• Probiotics, organic acids, and feed enzymes are increasingly used to support gut health welfare post-weaning.
• Welfare assessment of weaning practices should include mortality rates, diarrhoea incidence, and growth rates.
• Later weaning at 5-6 weeks, where feasible, significantly reduces welfare impacts and post-weaning disease.