Herbs have been used by all cultures for centuries; each area of the world uses herbs local to that area. Western herbs tend to work slowly to restore health and balance to the body, while Chinese herbology contains some fast acting herbs. Oriental herbs can be divided into two categories, food and medical. Herbal medicines have always been a form of therapy for livestock among resource poor smallholder farmers. This article is a review of present literature data on the usage of medical herbs properties (including improve digestibility, antimicrobial, antiinflammatory, anti-oxidant and immunostimulant) in animal's nutrition.