title: The effect of crude fibre on apparent digestibility and digestible energy content of extruded dog foods.
abstract: The apparent digestibility of nutrients and energy of 38 commercial dry extruded dog foods was measured using six adult (2 to 3 year-old) female Beagles. Diets contained [in g/kg dry matter (DM)]: 164-360 crude protein (CP); 79-261 ether extracts (EE); 8-33 crude fibre (CF) and 318-585 nitrogen free extracts (NFE). Apparent energy digestibility ranged from 77.3 to 91.6%, and was closely related to CF content (r=-0.85), yielding the resultant equation: GED (%)=94.00 - 4.04 x CF (% DM). The estimation of digestible energy content of foods from digestibility coefficients predicted from the above equation and gross energy measured or estimated from the Weende fractions, provides a more accurate prediction of experimental values than the Atwater approach followed by the National Research Council and the Association of American Feed Control Officials.
authors.affiliation: Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad de Zaragoza, Zaragoza, Spain. ccastri@posta.unizar.es
authors.forename: C
authors.initials: C
authors.lastname: Castrillo
authors.forename: F
authors.initials: F
authors.lastname: Vicente
authors.forename: J A
authors.initials: JA
authors.lastname: Guada
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D004043:Dietary Fiber / Q000494:pharmacology*; D004044:Dietary Proteins / Q000378:metabolism; D004063:Digestion / Q000187:drug effects* / Q000502:physiology; D004285:Dogs / Q000378:metabolism*; D002149:Energy Intake / Q000502:physiology*; D004734:Energy Metabolism; D005243:Feces / Q000737:chemistry; D005260:Female; D009584:Nitrogen / Q000378:metabolism; D012044:Regression Analysis
chemical_list: D004043:Dietary Fiber; D004044:Dietary Proteins; D009584:Nitrogen