SUMMARY

Suckling pigs, in hog raising, is the most susceptible category. The second category, regarding the susceptibility, is the categori of weaning pigs, when the food conversion is hecessary from suckling into concentrated food with the least stress as it is possible, The changes of both the environment and the nutrition cause the stress in piglets, which is most frequently manifested by diarrhea. Diarrhea is the result of intestinal microbiological disbalance. Antibiotics as additives have baen used so far. In our wor we have used nutritive additives... which consist of bacteria. (the number of germinate spores in 1 g of substance). Probiotics has shown its positive characteristics in weaning pigs (body mass) qhich was reflected in a better digestibility and better growth. The better degistibility of raw proteins 3,05 %, raw fat 15,56 %, and raw cellulose 5,59 %. A 5,5 % greter growth than in a group without probiotices.