Rooting is a fundamental behavioral need for pigs, driven by foraging instincts that persist regardless of whether food is scarce. Providing rooting substrates significantly improves pig welfare.
Rooting is not merely a preference for pigs - it is a deeply wired behavioral drive that expresses their evolutionary history as foragers. Denying this behavior causes measurable psychological frustration that manifests as aggression, redirected behavior, and stereotypies. The policy landscape is moving in the right direction: EU legislation mandates enrichment, and higher-welfare standards increasingly require loose rooting substrate. But the gap between what the law requires and what constitutes genuine welfare is large - a hanging chain does not adequately substitute for real rooting material. Progress requires raising standards for what counts as adequate enrichment, and monitoring actual pig behavior to verify welfare is being met in practice.