The design of farrowing environments significantly affects sow welfare, piglet survival, and the expression of natural birthing behaviors, with well-designed loose farrowing systems offering meaningful welfare improvements over conventional crates.
The design of farrowing accommodation is among the most consequential decisions in welfare-focused pig production because it determines whether sows can express the powerful behavioral drives associated with parturition. Farrowing pens that provide nesting material and freedom of movement allow sows to build nests, adopt lateral lying positions they prefer for nursing, and interact naturally with their piglets. Research consistently shows that sows in well-designed free-farrowing pens show lower stress hormones, more positive behavioral indicators, and better maternal behavior than crated sows. Protecting piglets from crushing in loose systems requires good pen design including heated creep areas, floor texture that prevents slipping, and low barriers that provide piglet refuges without restricting sow movement. The combination of design and skilled stockmanship can achieve free-farrowing outcomes that match or improve upon crate-system piglet survival.