Oligosaccharides can promote the growth of th e beneficial germs within bowel of the animals, repress the harmful germs grow, ma intain the normal environment of digestion, increase the immunity of the animals ’body, the resistance to diseases and benefit to the metabolism of fat and so o n . Oligosaccharides were already used in the production of the chicken, pigs an d cows. The effect of oligosaccharides as a feed component is up to the oligosac charides categories, animals categories, way of adding olig...