The accomplishment of this work took place in zoobreeeding Bellavista, Cali-Colombia. Events this refers to 120 births of 54 females mated to 22 males, were included in this study, data gathered in a period of 3 years. These animals present weight averages of 94,227 and 407 g, per birth (231 breedings), weaning (204) and end of foIIow-up (170) respectively. A distribution of weight is of normaloide” type, with a slight positive asimetry. Coefficients of correlation between body weight, are decreasing as time pass. In each stage of life, the average weight of animals, showed remarkable difference, in accordance with the sex and the size of the brood or litter. To compensate the effects, all data was adjusted in a multiplication way and correction was made in a lineal way, according to age. ln selection of breeder, three critetions were taken in mind: group of best behaviour, fathers with slight difference from the best one, and fathers with childs with more weight homogenously. Estimation of heredability for increments post-weaning by the method of Paternal Brothers, to throw a value of 0.298 and by means of the multiplication adjustment, was incremented in a 72% in combination of the three factorso Based on adjustment of data, was defined as criterion of selection of breeds, the combinations of features as body weight at 90 days and increase post-weaning, with exigence of requirement to be over the genera I media plus 0.5 times the standart desviation.