Our results show that the lactulose supplementation
in periparturient sows leads to better results of sows and
their piglets. Especially the significant reduction of the
length of pregnancy in the trial group, reduced losses of
their piglets and weaners, significant daily weight gains
of weaners produce evidence of usefulness of lactulose
in periparturient sows. Considering the results of the
field trial we suggest a higher daily dose of lactulose.We
think that about 80 ml per day and sow are necessary to
show more significant differences, e. g. in IgG antibodies
to C. perfringens PLC, performance parameters like
losses of piglets, numbers of alive born piglets, and
numbers of weaned piglets.