Smaller group sizes have been studied much more than larger ones which are now more common in North America. Pigs may adapt differently in large social groups which could alter their behaviours and feeding activity. Changes in behaviour could lead to lower productivity and welfare of the pigs. Grower-finisher pigs were studied in groups of 18 and 108. Once pigs were moved to larger groups there were immediate changes to feeding behaviour, but no long term effects were noted for social and feeding behaviour changes. Management of feeder accessibility is important directly after the formation of larger groups.
Feeding and Social Behaviour of Finishing Pigs in Fully Slatted Large Groups (full article)
