Understanding the full repertoire of natural pig behavior is essential for designing production systems that meet behavioral needs and prevent the damaging redirected behaviors that indicate welfare failure.
Natural behavior provision in pig welfare is not sentimental anthropomorphism but evidence-based welfare science. The behaviors pigs are motivated to perform in the absence of environmental constraints represent the needs that, when unmet, cause frustration, redirected aggression, and self-harm. Designing systems around natural behavior patterns — rooting substrate, pre-farrowing nesting material, social play space, temperature regulation options — prevents welfare problems at their source rather than managing their consequences.