1CP: Crude Protein, A: Soluble fraction, B1: Fraction of rapid degradation, B2: Fraction of intermediate degradation, B3: Fraction of slow degradation and C: Indigestible fraction; 2NDF: Neutral detergent fiber; 3ADF: Acid detergent fiber; 4NFC: Non-Fibrous Carbohydrates; 5TC: Total Carbohydrates, A+B1: Soluble fraction and rapid degradation, B2: Fraction potentially degradable, C: non-degradable fraction; 6TDN: Totals digestible nutrients (estimated by TDN = OM (%) /100 (26.8 + 0.595 (IVDOM (%)))