Fig. 2.

Diurnal changes in the 1-h mean ruminal and reticular pH. Ruminal and reticular pH were measured simultaneously during the experimental period. Cattle were fed a high-forage diet for 7 days (HAY period) and then a high-grain diet for 7 days (CON period). A SARA challenge was performed as a high-forage period followed by a high-grain period. Day 7 and 14 indicate the last days of the HAY (day 7) and CON (day 14) periods, respectively. Arrows indicate feeding times (08:00 and 17:00). The values shown are means ± SEM