Rooting is one of pigs' most strongly motivated behaviors, and provision of appropriate rooting substrate is among the most impactful welfare interventions available to pig farmers.
The deprivation of rooting opportunity in intensive pig farming causes measurable behavioral frustration and chronic psychological welfare deficits. Pigs that cannot root show higher rates of aggression, tail biting, and stereotypic behaviors. Providing straw fundamentally transforms pig welfare in barren housing — the reduction in tail biting and aggression is rapid and dramatic. The challenge is that slatted floor systems, designed for waste management efficiency, are largely incompatible with straw bedding. This creates a fundamental tension between production efficiency and animal welfare. Some innovative systems provide partial straw access or purpose-designed rooting boxes that reduce slatted-floor incompatibility. Policy change requiring true rooting substrate is the most impactful systemic intervention.