Pig Welfare in Deep Litter Systems

Deep litter systems for pig farming offer welfare improvements over concrete floors but require careful management to avoid ammonia build-up.

Key Facts

Deep litter systems use straw or other organic material as bedding
Pigs can root, nest, and engage in natural behaviors on litter
Poor litter management causes ammonia accumulation harming respiratory health
Well-managed systems improve leg health and reduce aggression
Deep litter is more compatible with positive welfare than bare concrete

Welfare Considerations

Deep litter pig systems represent a meaningful welfare improvement by allowing pigs to express fundamental behaviors like rooting and nesting. However, welfare gains depend entirely on management quality. Overstocked pens, infrequent bedding changes, and poor ventilation can make deep litter systems worse for respiratory health than bare concrete. Proper stocking density, regular bedding addition, and good ventilation are non-negotiable for welfare benefits to be realized.

What You Can Do

Support farmers transitioning to enriched or litter-based pig housing
Ask retailers about housing systems used by their pork suppliers
Advocate for outcome-based welfare standards that include litter systems
Encourage research into optimal deep litter management protocols