Pig performance comparing a production system using large static groups formed during lactation to a production system using sized and resorted groups in nursery and finisher

Groups of 95 pigs commingled during lactation (G) were compared to similar-sized groups from crates that were sorted into eight nursery pens or four finishing pens (P). System differences contributed to a trend for improved feed:gain (1.479 G, 1.696 P; SE = 0.074; P =.09) in the G nursery.