The ADFI during this period (21 to 56 d) was not affected by treatment (P > 0.10), with average value of 614 ± 24 g/d. For G:F, an effect of i.m. injections was detected in S+ litters but not in S− litters (sow treatment × piglet treatment; P < 0.05); the value was approximately 7% greater in S+P− piglets than in piglets in the 3 other treatments (Table 5). I