An experiment was made for evaluating the effect of lysine levels on the performance of piglets fed on pre-starter diets containing rice broken and different lysine levels. Eighty, 21-day-old mestizo pigs weighing 6.17 ± 1.02 kg were used; they were distributed using a randomised complete block experimental design, involving four treatments, five repetitions and four piglets per experimental unit. The trial was divided into two periARTICULO ORIGINAL/ORIGINAL ARTICLE