Discussion: The piglets that did not receive iron had clinical signs of anemia (pallor of mucous membranes, pallor of
the skin of the whole body), while these symptoms were not identified in piglets which received iron. Anemia in piglets
which did not receive iron likely contributed to the higher mortality of piglets in both phases, suckling and nurturing,
compared with piglets that received iron. Due to lower production performance, the growth rate of group C piglets lagged
behind, resulting in twice the mortality rate in the nurturing stage compared to piglets with iron administered IM, SC or
PO. In piglets, which were treated with iron there were no significant differences in mortality in the suckling and nurturing
stages, which indicates that all three modes of administration of iron had the same effect on mortality. In this study, the
subcutaneous method of iron administration proved to be the most effective on blood values and production performance
of piglets. In this study, subcutaneous injection of iron was the most effective administration method and consequently
the best production performances.