Scientific research on pig enrichment has identified specific materials and strategies that effectively improve welfare. Implementing these findings reduces harmful behaviors and promotes positive states in pigs.
The science of pig enrichment has advanced considerably in recent decades, moving from simple hanging objects to evidence-based material hierarchies. Studies consistently show that loose, manipulable substrates that satisfy rooting behavior are far superior to rigid objects for improving welfare. Pigs given access to straw show lower cortisol, reduced aggression, and fewer tail-biting outbreaks than those in barren pens. The welfare benefit of enrichment is not merely about keeping pigs occupied; it reflects the satisfaction of fundamental behavioral motivations. Regulators and producers increasingly recognize that enrichment is not optional but essential, yet implementation in practice still lags significantly behind scientific understanding.