supplementation. In this trial, digestibility of nutrients was
higher for SC and MOS+SC supplemented cows than for
other cows and the higher DM digestibility probably was
the result of higher digestibility of CP and NDF. Since the
digestibility of MOS+SC cows did not exceed the
digestibility of SC cows, it could be inferred that SC was
responsible for the increased digestion in both treatments.
This conclusion is confirmed by unchanged, or only slightly
changed, digestibility of nutrients in MOS relative to the
control. As a consequence of improved NDF digestion, it
was expected that lipogenic precursors would be more
available for SC-fed cows. We observed that a numerical,
but biologically meaningful, increase occurred in BW, FCM
and milk fat percentage suggesting that lipogenicity was
stimulated. However, small number of cows and short
experimental period probably did not allow for completion
of SC effect on performance.