The young turkey microbiome develops over time. (A) Relative abundance of the most predominant taxa at the genus, or lowest taxonomic level denoted, per sample. “Other” represents taxa comprising less than 10% of the total relative abundance per sample. (B) Principal-coordinate analysis of unweighted UniFrac distances, colored by age of the bird. (C) OTUs significantly different in centered log-ratio-transformed relative abundance from one time point to the next. Stars denote the OTUs significantly different from that time point compared to day 6 (P < 0.05). OTUs are labeled as their most specific taxonomic identifier available. For panels A to C, turkeys were fed only control diet. Ileum: n = 14, day 3; n = 16, day 6; n = 15, day 13. Cecum: n = 16, day 3; n = 16, day 6; n = 16, day 13.