Body weight (BW) on day −7 preweaning and to day 3 postweaning in pigs nursed by sows receiving a corn-soybean meal based diet supplemented with 1 % protected fish oil (1% PFO, n = 16 pigs; Gromega, JBS United Inc., Sheridan, IN) or no supplement (0% PFO, n = 16 pigs) 1 wk prior to farrowing until day of weaning (31 ± 2 d of age) and provided ad libitum access to either the control or 1% PFO nursery feed consistent with their pre-weaning dietary treatment group. a–cMeans ± SEM with different letters differ for diet (P = 0.03) and day (P < 0.01).