RUMINANT is an animal-level model that simulates the effects of nutrition (feed quality and availability) on the growth and production of cattle, sheep and goats. The RUMINANT model consists of a dynamic section that estimates intake and the supply of nutrients to the animal from the knowledge of the fermentation kinetics and passage of feed constituents (carbohydrate and protein) through their gastrointestinal tract and their subsequent excretion. We develop the RUMINANT model: read more about the model in work by Herrero et al. (2008).