A total of 120 crossbred (Large White by Landrace) male piglets weaned at 22 d, were randomly distributed in three groups: (A) control diet without growth promoter, (B) control diet with 50 ppm of CARBADOX, and (C) control diet with 0.1 g per kg of ESPORAFEED PLUS. We conclude that under our experimental conditions: (i) the addition of ESPORAFEED PLUS to early weaned piglet diets at 109 CFU per kg tended to increase growth for the first 10 d (P equal to 0.11) and to decrease feed conversion ratio for the first 18 d after weaning with respect to control animals; (ii) animals fed diets supplemented with CARBADOX had better growth and lower feed conversion ratio than control animals; and (iii) there were no significant differences between CARBADOX and ESPORAFFED PLUS.