were found compared to CON. Meanwhile, cecal Lactobacillus populations in PF (P < 0.05) and Bifidobacterium populations in WB (P < 0.05) were higher than CON. The glucose transporters gene expression was up-regulated (P < 0.05) in WB and/or PF compared to CON. To be concluded, influences of dietary sources on intestinal microflora and volatile fatty acids seemed to be related to fiber components, which possibly led to the changes in intestinal mucosal digestive physiology and thus affect production parameters of fattening pigs.