Table 3.

Comparison of the concentrations of four short chain fatty acids (Mean ± Standard deviation) by caecal fermented between 6 different probiotic-treating groups and an untreated group by probiotic supplementation.

SCFA	Chickens fed with a variety of probiotic supplements						Control group
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6	Group 7
Acetic acid	56.92 ± 15.46*	49.50 ± 6.89*	78.92 ± 16.41	78.17 ± 11.59	79.21 ± 3.83	93.24 ± 1.53*	76.60 ± 9.63
Propionic acid	31.40 ± 5.90	28.80 ± 3.01	30.47 ± 2.12	30.40 ± 2.92	29.86 ± 1.57	31.37 ± 2.88	27.92 ± 1.36
Isobutyric acid	34.77 ± 4.80*	28.39 ± 2.59	32.71 ± 2.11	20.32 ± 0.06	20.47 ± 0.14	24.31 ± 7.47	20.31 ± 0.90
Butyric acid	22.86 ± 3.65	20.52 ± 0.33	20.62 ± 0.15	33.73 ± 5.48	32.38 ± 2.77	43.29 ± 3.80*	30.09 ± 2.53

Note: the *indicate significant differences (P < 0.05) between the probiotic-treating groups and control group.