Fig. 2.

Concentrate intake (arithmetic mean±standard deviation) of calves during the observation period from the second to the 21st day of life divided into the restrictive and ad libitum milk feeding regimens. The area shaded in gray shows the period of diarrhea which usually began on the eighth day of life and lasted 5+/−2 d. Asterisks (^⁎⁎) indicate statistically significant differences from the mean value of the concentrate intake of day 2 and 3 of life (P time<0.01, P treatment>0.01; P time×treatment>0.01).