Fig. 1.

Concentration (mmol/L) of glucose (■), non-esterified fatty acids (NEFA; ▼) and β-hydroxybutyrate (BHBA; ●) in blood serum of multiparous cows during the experimental period. Grey shaded areas indicate three days before, three days of and three days after feed restrictions (70 % of previous ad libitum energy intake) during early (d 23–31 pp) and mid-lactation (d 138–146 pp). Values are presented as LSM ± SEM