Gestating Sow Enrichment and Welfare

Pregnant sows in group housing systems benefit enormously from environmental enrichment that satisfies rooting, foraging, and investigatory drives, reducing aggression, stereotypies, and chronic stress during the long gestation period.

Key Facts

Pig gestation lasts approximately 114 days; sows may spend most of this period in group housing after the EU ban on individual stalls beyond 4 weeks post-mating
Group housing without enrichment leads to severe aggression between sows competing for resources, causing injuries and welfare harm
Natural sow behaviour includes rooting, foraging up to 8 hours per day, building nests, and exploratory investigation of the environment
Rooting substrate such as straw, compost, or peat satisfies foraging drives and significantly reduces stereotypic behaviour
Hanging chains, wooden logs, and novel objects provide investigatory enrichment but are less effective than rooting substrates
Feed delivery systems including electronic sow feeders reduce competition and allow individual feeding without confrontation
Enriched group housing with adequate space and rooting substrate produces lower cortisol levels, fewer injuries, and improved reproductive performance

Welfare Considerations

The transition from individual gestation stalls to group housing in Europe has been a major welfare improvement for pregnant sows, but group housing without enrichment can create new welfare problems — primarily aggression between sows competing for food and space. The key to successful group housing welfare is providing substrate that satisfies the powerful rooting drive: sows given access to straw, peat, or compost spend far less time in aggressive interactions and far more time in natural foraging behaviour. Producers who invest in enrichment consistently report reduced injury rates, better body condition scores, and improved farrowing performance. Enrichment is not an optional extra in sow welfare — it is a necessary complement to group housing.

What You Can Do

Support certification schemes that require rooting substrate provision for gestating sows beyond basic regulatory minimums
Ask pork retailers about their sow enrichment requirements in group housing supply chains
Advocate for regulatory minimum enrichment standards that include rooting substrate rather than just hanging objects
Donate to farm animal welfare organisations campaigning for improved gestating sow welfare globally
Choose pork products certified to RSPCA Assured or Soil Association standards that include enrichment requirements