RESUMO
The objective of this study was to evaluate the effect of pre-farrowing lipid supplementation for three days on performance parameters of sows and piglets and the survival rate of litters. Four hundred hyperprolific sows were randomly distributed in blocks according to their body condition score, weight, and parity order. Three levels of soybean oil were added on top at the time of feed supply and compared to the control treatment. The levels were: 250 mL, 500 mL, and 1,000 mL, in addition to the control that contained only the crude fat present in the feed (5.04%). Sows were weighed and evaluated for their body condition score at the beginning and end of the lactation period, and their piglets were weighed at birth, after 24 h, and at weaning to determine colostrum yield of the sow and daily weight gain of piglets during the lactation period. Survival rate of litters was also evaluated. Weight loss of gilts decreased linearly as the level of supplemented oil increased. The other parameters evaluated were not affected by treatments, suggesting that the supplemented soybean oil was used for growth rather than milk production of gilts. Additionally, it had no effect on the performance of multiparous females. Under the experimental conditions of this study, soybean oil supplementation for gilts in the first three days before farrowing decrease their weight loss but does not change their body condition score, colostrum yield, and performance and survival of their litters.(AU)