Post-partum supplementation with MOS, live yeast, and
the mixture of the two additives resulted in no changes in
cow performance and ruminal metabolism under the
conditions of this experiment. Significant improvement in
digestibility of nutrients in cows fed live yeast suggested
that these products may have the ability to exert theirpositive effects on digestion processes, but not necessarily
on milk production, in a short duration. The MOS+SC only
significantly increased milk protein percentage, but not milk
protein yield. Using the combination of yeast and MOS did
not show any advantage in ruminal metabolism over using
yeast or MOS alone.