Pig Stocking Density Welfare Science

Pig stocking density directly affects behaviour, health, and welfare. Research has established evidence-based recommendations that exceed minimum legal requirements.

Key Facts

EU minimum space allowance for finishing pigs is 0.65 m2 per pig above 85 kg liveweight
Research consistently shows welfare improvements above minimum legal requirements up to 1.0-1.2 m2
Lower stocking density reduces tail biting, aggression, and lameness rates significantly
Spatial facilitation of resting and activity affects behaviour budgets and welfare outcomes
Cost-benefit analysis shows lower stocking density is financially competitive when health costs are included

Welfare Considerations

Minimum legal stocking densities for pigs in most jurisdictions are set below levels that optimise welfare based on research evidence. At legal minimum densities, competition for resting space, feeding space, and enrichment resources elevates aggression and injury risk. Research shows welfare indicators improve progressively from minimum legal density up to approximately 1.0 m2 per finishing pig. The economic case for higher space allowances strengthens when reduced medication costs, improved growth rates, and lower mortality are factored in.

What You Can Do

Choose pork from farms certified to higher space standards than legal minimums
Support policy advocacy for evidence-based minimum space requirements in pig welfare legislation
Learn about stocking density welfare evidence when evaluating pig farming claims
Support producer transition programmes that help farms move to higher welfare density standards
Reduce pork consumption to reduce demand pressure driving high-density systems