Environmental enrichment for livestock is not a luxury but a basic welfare requirement; the evidence base for its positive effects on behaviour, physiology, and health is substantial.
Enrichment is the bridge between welfare as absence of harm and welfare as genuine wellbeing. An animal in a barren but physiologically adequate environment is not suffering from hunger or pain but is experiencing profound deprivation of the behaviours its nervous system evolved to perform. The motivational systems for exploration, foraging, social interaction, and play are as real and insistent as those for hunger and fear. Enrichment that provides appropriate outlets for these motivations does not merely reduce welfare deficits — it enables positive welfare states that the absence of suffering alone cannot provide. The investment is modest and the returns in welfare, productivity, and reduced problem behaviour are well documented.