The bacteria in the formulation of Hypro-Tect produce lactic acid. Lactic acid produced by these bacteria reduces the pH of the intestine environment and stops the growth of pathogen bacteria such as E-coli and Salmonella. The most important activity location of probiotics is the intestine. The probiotic bacteria enter the intestine as auxiliary forces and colonization there. The probiotic bacteria improve the digestion and absorption of nutrients in the intestine and adhere to the intestine wall and prevent colonization and activity of pathogenic bacteria. It is recommended to use Hypro-Tect at the time of stress since in this condition the release of Corticosteroids is increased and it leads to a reduction of the production of Mucins on the surface of the small intestinal villus. Mucin is a product that most of the beneficial intestine microorganisms use it and by its reduction, the number of beneficial intestine microorganisms such as Lactobacillus decreases, and the number of harmful bacteria such as Coliform increases. This problem can be solved by Hypro-Tect and the desired microorganisms can replace in the intestine again. Besides improving the speed of growth and feed conversion ratio, the side-effects caused by stress and mortality will be decreased in the flock.