Probiotics are lactic acid bacteria group created. Gram-positive No sporulation Spherical or rod-shaped pieces, short term immobile. Most require oxygen to grow slightly. No cytochrome Can not create catalase, but may find similar enzymes catalase steel. Withstand the acidity or temperature 37-40 ° C, with the ability to control the balance. Help digestion and absorption of nutrients better. The chicken is healthy food can be absorbed at a top that. The average weight gain and improved feed conversion efficiency. Improves the digestibility of nutrients, including protein, fat and fiber in the diet of dry high. At the end of the supplementation of probiotics than the control group. And close to the group supplemented with antibiotics. Shows that probiotics help to better utilize the foods while broilers fed in amounts similar. Making chicken with weight gain, higher feed conversion efficiency of chickens. And antibiotics A similar feed conversion efficiency. Therefore, improved feed conversion efficiency improves the function of the intestine. Reduce constipation And improves the moisture content of the faeces Enhances calcium absorption in the digestive system can produce vitamins such as Vitamin B1, B2, B6, B12, biotin nicotinic acid and folic acid compete to opportunistic infections. Preventing the growth of microorganisms by communicating with healthy immune lymphoid tissues in the intestinal mucosa, thus creating a protective and stimulating the immune system to be in equilibrium, leading to the response of the body's immune defense system.