It is a unique freeze-dried product composed of normal intestinal bacteria from healthy adult chickens. It acts by the process of competitive exclusion to prevent colonization by transient pathogenic bacteria such as Salmonella, E. coli and Clostridium perfringens. It contains over two hundred different types of bacteria which colonize the intestinal tract and should be applied as early as possible in the bird’s life. It can be applied by coarse spray for day olds or via drinking water for older birds.