Table 2. Diversity and richness indices for faecal bacterial communities for the two groups across the 11 study days.

		Study day											SED			Benjamini-Hochberg P-value
	Group	1	2	3	4	5	6	7	8	9	10	11	Day	Group	D*G	Day	Group	D*G
Shannon	C	5.661	5.571	5.499	5.453	5.744	5.672	5.682	5.885	5.800	5.809	5.79	0.11	0.30	0.25	0.85	0.82	0.17
	A	5.813	5.842	5.908	5.798	5.834	5.916	5.845	5.825	5.778	5.638	5.628
Simpson	C	0.956	0.955	0.950	0.950	0.968	0.963	0.963	0.978	0.971	0.975	0.975	0.007	0.02	0.02	0.85	0.82	0.17
	A	0.974	0.973	0.974	0.967	0.978	0.984	0.975	0.972	0.972	0.966	0.961
Chao1	C	3190	3331	3132	3446	3244	3150	3247	3073	3090	3258	2971	251.6	272	397.7	0.85	0.82	0.83
	A	3100	2985	3289	3303	3108	2897	3295	3130	3620	2775	2943
S.obs	C	1729	1686	1664	1717	1777	1715	1744	1759	1734	1702	1715	68.62	135.1	132.1	0.85	0.82	0.83
	A	1652	1708	1770	1698	1638	1668	1784	1741	1714	1554	1596

Mean diversity indices (Simpson’s and Shannon-Weiner), species observed (S.Obs) and estimated species richness (S.Chao1) for fecal samples collected over the 11 study days (final 3 days hay feeding and 8 days hay plus barley feeding) between the two groups (C, Control; A, Aged). SED: standard error of the difference.