In the terminal colon, pigs offered the wheat-based diet+β-glucanst had decreased concentrations of total volatile fatty acids (P = 0.001), acetic acid (P = 0.001),propionic acid (P = 0.001), butyric acid (P = 0.001) and valeric acid (P = 0.002) and an increased acetic:propionic acid ratio (P = 0.010) compared with pigs offered the barley-based diet. Pigs offered the barley-based diet+enzyme composite had a decreased concentration of total volatile fatty acids(P = 0.048) and a decreased concentration of valeric acid (P = 0.010) compared with pigs offered the barley-based diet. There was no effect of dietary
-glucan source (P > 0.05) or enzyme inclusion (P > 0.05) on selected bacterial numbers in the terminal colon of finishing
pigs.