Sorting by parity to reduce aggression toward first-parity sows in group-gestation housing systems.


Young sows are subordinate and vulnerable in group-housing systems because they usually lose most fights and suffer more injuries than mature sows at mixing. This study was conducted to evaluate effects of sorting by parity on reducing aggression and associated stress with the aim to improve welfare and performance of first-parity sows in a group-housed… (More)
DOI: 10.2527/jas.2011-4869

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