title: Measurement of energy expenditure in the grazing ruminant.
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002151:Calorimetry; D002245:Carbon Dioxide / Q000378:metabolism*; D002250:Carbon Radioisotopes; D002417:Cattle / Q000502:physiology*; D004734:Energy Metabolism; D005069:Evaluation Studies as Topic; D005260:Female; D005402:Fistula; D011247:Pregnancy; D012756:Sheep / Q000502:physiology*; D014132:Trachea / Q000502:physiology / Q000601:surgery; D014140:Tracheotomy
chemical_list: D002250:Carbon Radioisotopes; D002245:Carbon Dioxide