Unlike the wild animals, in modern animal farming business, the livestock are put together in one place for the whole life, from birth to slaughter, they can’t obtain various bacteria from the natural environment, so their gut is not well trained as the wild animals from the beginning, its much more difficult for livestock, especially for the young ones to develop the balanced intestinal miroflora, its why the gut problems such as diarrhea are more likely to occur in the animal farming business, and diarrhea is very dangerous for young animals, will result lower growth rate, even death, so its important and necessary to give probioitc to the young animals, help them to quickly establish balanced intestinal microflora. 

Probiotics can be applied throughout the animal growth stages, providing various beneficial effects in each stage :
1.The intestinal tract of early growth stage animals is almost bacteria-free, giving probiotic will help animals to quickly establish intestinal microflora structure with dominance of good bacteria , make a huge difference in the later stage.
2. In the late growth stage, the intestinal functions are weakened, giving probiotic will help maintaining the balance of intestinal microflora and improve digestion and absorption of nutrients from feed.
3.When the diet change take place, often come with serious digestive problems, using probiotic would be ideal to prevent diarrhea.
4.After antibiotics treatments, the abundance of both good and bad bacteria in intestinal tract are reduced significantly, using probiotic will quickly restore the balance of microflora and help animals recovery from illness much quicker.
5.Using probiotic also help animals to cope with and recover from stress conditions such as crowding, transportation, extreme weather, etc.