Body weight gains and feed utilisation of piglets were similar in all groups (Table 2). In the experiment, 265 piglets were born and their average body weight at 1st d of age was 1.46 kg and at weaning 7.21 kg. During the nursing period (1-28 d of age), the average daily weight gains amounted to 214 g and after weaning (28-84 d of age) – 346 g. The average number of piglets born in the litter was: 10.8 in groups I and III, 11.0 in group II, and 11.5 in group IV.