Pigs are among the most behaviourally complex and cognitively capable farm animals; understanding their natural behaviour repertoire reveals the extent to which intensive housing denies fundamental needs.
The behavioural sophistication of pigs makes their welfare in barren intensive housing particularly concerning. Motivation to root is so strong that pigs on concrete floors will perform vacuum rooting — going through the motions without substrate — for hours. Cognitive complexity means boredom and frustration in impoverished environments represent genuine psychological suffering. Enrichment with rooting substrate is not a luxury but a fundamental welfare requirement.