Absorption Animal Nutrition (Physiology) 2 Feeds 2 Growth 2 Livestock 2 Models 2 Nutrients 2 Nutrition physiology 2 Physiology 2 Ruminants 2 Animal Nutrition (General) 1 Animal Nutrition (Production Responses) 1 Animal Wastes 1 Animal feeding 1 Animal nutrition 1 Animal production 1 Animal wastes 1 Biotrnsformation 1 Cattle 1 Deterministic models 1 Development 1 Digestion 1 Domestic animals 1 Economics 1 Emission 1 Environmental impact 1 Feed Composition and Quality 1 Fishes 1 Infrared 1 Labour 1