Fig. 3

Curves of the effect of different steam-flaked grains on postprandial plasma glucose, serum insulin, glucagon and lactic acid in weaned foals (Means ± standard error). Changes in mean plasma glucose level (A), mean serum insulin level (B), mean serum glucagon level (C) and mean serum lactic acid level (D) in the blood of weaned foals at different time points after feeding different grains. CG: Corn group (n = 6); OG: Oats group (n = 6); BG: Barley group (n = 6). * indicates that the CG was significantly higher than the BG (P < 0.05); ** indicates that the CG was highly significantly higher than the BG (P < 0.01)