Ruminant animals have evolved a capacious set of stomachs that harbour microorganisms capable of digesting fibrous materials, such as cellulose. This allows ruminants to eat and partly digest plants, such as grass, which have a high fibre content and low nutritional value for simple-stomached animals | Quantitative Aspects of Ruminant Digestion and Metabolism Second Edition This page intentionally left blank Quantitative Aspects of Ruminant Digestion and Metabolism Second Edition Edited by J. Dijkstra Animal Nutrition Group Wageningen University The Netherlands . Forbes Centre for Animal Sciences University of Leeds UK and J. France Centre for Nutrition Modelling University of Guelph Canada CABI .