Diets
contained 45% forage and 55% concentrate on a dry matter (DM) basis and treatments were: i) basal diet without additive (Control), ii)
basal diet with 32 g/d of mannan-oligosaccharides (MOS), iii) basal diet with 1.2×1010 colony forming units per day (cfu/d) of live yeast
(Saccharomyces cerevisiae CNCM 1-1077; SC), and iv) basal diet with a mixture of MOS (32 g/d) and SC (1.2×1010 cfu/d; MOS+SC).