Pig Growing and Finishing Welfare: From Weaning to Slaughter

The growing and finishing period represents the longest phase of a pig's commercial life and encompasses many key welfare challenges.

Key Facts

Most commercial pigs spend 16-20 weeks in growing and finishing units before reaching slaughter weight
Tail biting, aggression at mixing, and respiratory disease are the leading welfare problems in this phase
Stocking density standards vary widely by jurisdiction and production system
Enrichment provision is required by EU law but compliance and effectiveness vary considerably
Pigs are highly social animals whose welfare depends heavily on stable group composition
Poor air quality from ammonia and particulates is a significant but often overlooked welfare issue

Welfare Considerations

The growing and finishing phase determines much of a commercial pig's welfare experience. Social stability after initial mixing, environmental complexity, air quality, and space allowance all interact to produce positive or negative welfare outcomes. Tail biting outbreaks — which spread rapidly and cause serious injury — are a sentinel indicator of welfare deficits, most often related to enrichment inadequacy, overcrowding, poor air quality, or nutritional imbalance. Welfare-positive systems provide genuine rooting substrate, maintain stable groups, ensure good ventilation, and monitor pigs regularly for early signs of injurious behaviour. These measures are economically viable and increasingly demanded by conscious consumers.

What You Can Do

Choose pork from RSPCA Assured, Soil Association, or equivalent welfare-certified farms
Ask retailers about the enrichment and stocking density standards in their pork supply chain
Support legislation requiring adequate enrichment and stocking standards in pig farms
Reduce pork consumption or shift to higher-welfare alternatives when budget allows
Engage with food companies about their pig welfare policies and commitments