Chains and other minimum legal enrichment requirements in pig farming are insufficient for welfare — effective enrichment must engage natural behaviors genuinely.
The legal requirement for pig enrichment in the EU and many other jurisdictions has created a compliance culture focused on meeting the letter of the law rather than the welfare purpose behind it. A single hanging chain — the most commonly provided enrichment — fails to engage the complex rooting, exploration, and foraging behavioral systems that pigs are motivated to express. Pigs investigate novel objects briefly but habituate rapidly to static, unchanging items that do not provide genuine behavioral engagement. Effective enrichment must engage these systems genuinely: edible materials they can manipulate and destroy, organic substrates for rooting, and novelty that sustains interest. The welfare science is clear; the implementation gap reflects economic incentives and regulatory minimalism rather than ignorance.