The neonatal period is a critical time in piglet ontogeny, due to the fact that the GIT and immune
system have yet to fully develop [13]. These deficiencies result in low disease resistance in piglets and
make them vulnerable to invasion by pathogenic microorganisms. A serious infection or stress reaction
in the neonate has negative impact on piglets, thus affecting the whole process of individual
development [14].
Supplementation of LAB in neonatal piglets can regulate the formation of the piglet gut microflora,
thus benefiting the health of piglets [13,14]. Liu et al. [15] found that oral administration of
L. fermentum I5007 in formula-fed piglets (dosed daily with 6 × 109
CFU/mL of L. fermentum I5007