At d 16, 6 groups of 3 birds were assigned randomly to 6 dietary treatments: a control soybean oil diet without lysolecithin, a control pig lard diet without lysolecithin, a soybean oil diet with 250 ppm soybean lysolecithin, a pig lard diet with 250 ppm soybean lysolecithin, a soybean oil diet with 250 ppm rapeseed lysolecithin, and a pig lard diet with 250 ppm rapeseed lysolecithin.