Rooting is one of the most strongly motivated behaviours in pigs. Its systematic frustration in conventional farming systems is a major source of chronic welfare compromise.
Rooting is not merely a feeding strategy for pigs — it is a deeply motivated exploratory and foraging behaviour that pigs engage in regardless of satiety. Denying pigs the ability to root creates chronic frustration that manifests as redirected rooting behaviours toward pen mates, feeding equipment, and structural elements of their housing. These redirected behaviours are a welfare indicator and, when directed at conspecifics, a cause of additional welfare harm through skin lesions and tail biting. The solution is well-established: providing rooting substrate. Even small amounts of straw, peat, or compost significantly reduce redirected rooting. The barrier in intensive systems is management complexity and concerns about slatted floor function — challenges that are surmountable but require investment. Pigs in deep-straw or outdoor systems with genuine rooting opportunity have dramatically better welfare in this domain.