Abbreviations: ADF, acid detergent fibre; ADG, average daily gain; CP, crude protein; CT, condensed tannins; DCP, digestible crude prot digestible energy; DM, dry matter; DOM, digestible organic matter; FCR, feed conversion ratio; LW, live weight; ME, metabolizable energ microbial protein synthesis; NDF, neutral detergent fibre; OM, organic matter; OMDR, organic matter digested in the rumen; VF...