During the swine embryo stage, antibodies are not easily obtained and immunity is derived from the mother. Weaning and change of feed, transportation, and other stresses can result in drastic changes to intestinal flora and decreased immunity. When energy for growing is most needed, abnormal fermentation by harmful gut bacteria results in diarrhea, structural damage in the intestine, and growth inhibition, which is often accompanied by an increased occurrence of disease and stronger odors in the barn. The most important solution is to establish intestinal flora barriers and immunity in swine to resist disease and promote absorption. The use of our probiotics is an effective method to increase immunoglobulin in breast milk, protect intestinal structure, and alleviate diarrhea.