Providing rooting enrichment for pigs engages their strongest and most persistent behavioral drive, with research demonstrating measurable welfare improvements from even simple substrate additions in intensive housing.
Rooting enrichment is the most direct welfare intervention available for intensively housed pigs because it addresses the strongest and most persistent behavioral drive in the species. Even minimal rooting substrate provision — a small amount of straw, a rooting ball, a substrate-filled net — produces measurable reductions in stereotypic floor-rooting and aggression. However, the welfare benefit is dose-dependent: a symbolic handful of straw provides far less benefit than deep litter or outdoor soil access. The EU requirement for manipulable enrichment is an important baseline that is frequently met at a level that provides minimal rather than adequate welfare benefit. Stronger implementation standards would deliver substantially greater welfare improvement.