Pen design for pigs has moved beyond minimum standards as research demonstrates the profound welfare effects of housing environment.
Pigs in barren concrete pens cannot perform fundamental behavioral needs - rooting is as basic to pigs as swimming is to ducks. Bored, frustrated pigs redirect their behavioral drives toward pen-mates, causing tail biting and other injurious behaviors. The industry response of tail docking removes the symptom while leaving the cause. Environmental enrichment that provides genuine engagement - manipulable materials, substrate for rooting, complexity - dramatically reduces injurious behavior and improves welfare indicators. The cost of providing adequate enrichment is modest compared to the benefits in reduced mortality, improved growth, and genuinely better pig lives.