Table 1. Analysis of similarities (ANOSIM) using unweighted UniFrac metric at even sampling depth of 400 reads per sample.

Category	No. of sub Category	R-value	p-value
BCO status	Healthy vs. BCO	0.4402	0.001*
Age	14, 41 and 49	0.1245	0.001*
Floor	Litter vs. Wire	−0.0220	0.896
Feed	Starter vs. Finisher	−0.0010	0.507
Pen setup	L1–56, L1–34, W35–56 vs W1–56	0.0157	0.151

^*Significantly different (p < 0.05).