Pig pen design profoundly affects behavioral welfare, with features including space allowance, enrichment provision, and layout determining the quality of daily life for housed pigs.
Pen design determines the physical and behavioral constraints within which pigs live every hour of their lives. Minimum regulatory space allowances are regularly challenged by behavioral research showing undisturbed behavior requires more space. Pen features including enrichment placement, temperature gradients, and functional area separation allow pigs to make behavioral choices that express their preferences and motivations. Pigs in well-designed pens show greater behavioral diversity, lower aggression, and more positive welfare indicators than those in minimally compliant spaces. Investment in better pen design at the planning stage is cost-effective compared to retrofitting welfare improvements.