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The relationship between BW and net energy requirements for 100 g/d of average daily gain of growing goats, as predicted by different feeding systems (Cannas et al., 2008, modified), assuming a mature weight of 55 kg for females and 85 kg for males for the Small Ruminant Nutrition System model (SRNS). The different approaches taken bring to very different estimations of the energy requirements for growth. AFRC = Agricultural and Food Research Council; NRC = National Research Council.
