Feeding and sleep patterns of cows prior to and post parturition

Abstract

Effects of late pregnancy and early lactation on feeding and sleep patterns are described. Jaw movements and the electrocorticogram were continuously recorded from 2 weeks before to 4 weeks after parturition in two stalled cows receiving a constant daily allocation of concentrates and hay ad libitum. The cows were milked twice daily from 24 h after giving birth, except in one instance of 2 days duration, and were allowed to suckle their calves on two occasions. In the week immediately prior to parturition, feeding occurred only during the daytime and rumination occurred in shorter periods. After parturition, the mean daily time spent in food intake and rumination increased progressively throughout the first 4 weeks of lactation. Reduction in sleep duration and in resting of the head on the floor were observed when the cows were allowed to suckle their calves and after the period of no milking. Disturbances in feeding and sleep patterns were also observed during the first 2 days after separation from their calves.