From the reviews: "The aim of the book is to provide a guide to the methods involved in collecting samples, preparing and screening plants for bioactive properties for use in manipulating important ruminal fermentation pathways, and against gastrointestinal pathogens. ... the book is of great value to students in the plant and animal sciences. It is also recommended to researchers and all those involved in developing efficient and environmental friendly livestock production systems." (Gerhard Flachowsky, Animal Feed Science and Technology, February, 2010)