Group housing for pregnant sows is now required across much of Europe and improves welfare compared to individual stalls, but management is key to minimising aggression and competition.
Group housing enables social interaction, exercise and expression of natural behaviour, benefiting sow welfare compared to stalls. However, poorly managed mixing causes injuries from fighting, and subordinate sows may be food-deprived. Key welfare priorities include good space allowances, enrichment materials, safe mixing protocols, and prompt removal of injured animals.