Additional file 1: Supplemental Table 1. Information for each sample including: SampleID, AnimalID, Flock, Year of Birth (YOB), Sample Date, Diet, Age, Time Off Feed, Feeding, Group, Cohort, Batch, Shelf, Library and Well. Supplemental Table 2. Summary of Supplemental Table 1 based on Flock, Sampling Year and Cohort. Supplemental Table 3. Summary of Supplemental Table 1 based on Animal and Group.