twice daily at 06.00 a.m. and
16.00 p.m. during milking. All cows were fed ad
libitum of rice straw as a roughage source while
allowing for 10% refusals. The experiment was run
in three periods, each experimental period lasted
for 21 days, the first 14 days for treatment
adaptation and for feed intake measurements whist
the last 7 days was for sample collection of feeds,
fecal, and urine. Body weights were measured at