Providing pigs with rooting opportunities and outdoor access is among the most impactful welfare improvements in commercial pig production, yet remains absent from the majority of global pork production systems.
The rooting drive in pigs is a primary welfare indicator — not merely a preference but a powerful behavioural motivation that causes measurable distress when frustrated. Pigs in barren environments direct this motivation toward available targets including pen mates, leading to tail biting and ear biting injuries that cause pain and secondary infection. Providing straw, compost, or other manipulable substrate satisfies the rooting drive directly, reducing misdirected behaviour dramatically. Outdoor systems with soil access provide the richest rooting environment but require management to control mud contamination and disease risk. Even indoor systems can substantially improve welfare through deep straw bedding or soil boxes providing genuine rooting opportunity.