Immune system is an essential part in the body which protects the body from the attack of microbes and pathogens. An excellent immune system shields the body from these attacks of these pathogens and improves better health and growth. Immunity is a complex and specialized system of organs, tissues, cells which are devoted to the surveillance, detection, defensive and elimination of foreign pathogenic agents. With the elimination of pathogens from the body it makes it body healthier and better disease resistance. A high-quality feed provides all the desired nutrients and vitamins which boost and enhance its function. It is recommended to use supplement along with the feed which enhances the better functioning of the system. But now the feed is not sufficient in providing the nutrients to the body we can use feed supplement which maintains the level of vitamins and minerals in the body. Other than this we also use immunity booster supplement which enhances the immune system. Stressnill is a widely used supplement for this as it is composed of natural immunity booster with added advantage of vitamin-E & Selenium. It improves the immunity and gives strength and vitality to animals.