FIGURE 1.

Effect of rearing environment and source of nutrients during lactation on (A) body weight (BW, kg), (B) average daily gain (ADG, kg/d), and (C) feed efficiency of pigs (4 to 85-day-old, least square means). Four littermates were assigned to two treatments [SR (red), sows reared; IR (blue), isolated reared] 4 days postpartum from 20 sows with two neonates transferred to an offsite nursery facility and housed in deck while 2 littermates remained with sows. Upon weaning at day 21, all pigs were transferred into the same facility and fed the same diets from weaning to study completion, with IR pigs housed in adjacent pens to SR littermates. Data were analyzed using GLM procedure of SAS with the two stars symbol indicating significant treatment differences (P < 0.01) and the single star symbol showing a tendency of significance (0.05 < P ≤ 0.10).