Pigs have a fundamental behavioral need to root and explore substrates. Providing appropriate materials in pig housing is one of the most impactful and cost-effective welfare improvements possible in intensive systems.
The deprivation of rooting opportunities represents one of the most fundamental and widespread welfare problems in commercial pig farming globally. A pig in a barren concrete pen with no manipulable material is being denied its primary species-specific behavioral motivation - equivalent in severity to preventing a cow from grazing or a horse from moving. The welfare science is clear: enrichment materials dramatically reduce abnormal behaviors like tail biting, improve behavioral diversity, and reduce stress indicators. The cost-effectiveness of straw-based enrichment makes the welfare case compelling even within commercial constraints. Regulatory requirements for enrichment exist in many jurisdictions but meaningful compliance requires appropriate materials, not just plastic tokens.