How does feeding in the evenings reduce the occurrence of nighttime calving?
Rumen motility studies indicate the frequency of rumen contractions is lower a few hours prior to calving. Pressure in the rumen begins to decrease in the last 2 weeks of gestation, with a more rapid decline during calving. It has been shown that night feeding causes pressure in the rumen to rise at night due to feed volume in the rumen from evening feeding and decline during the daytime.