Rooting is a fundamental pig behavioral need that is frustrated by barren concrete and slatted-floor housing. Providing rooting materials is one of the most effective pig welfare interventions available.
Frustrating rooting motivation in pigs is one of the most clear-cut welfare harms in intensive pig production. Pigs given rooting material consistently show reduced aggression, less stereotypic behavior, and lower stress indicators. Even simple enrichment like straw or newspaper reduces welfare problems significantly. Outdoor systems that allow genuine rooting and foraging produce the most welfare-positive pig behavior.