Heatmap of the correlation between rumen fluid - faeces pairs. Samples were correlated with each other to asses the degree of similarity between samples. a) Correlation in the number of reads assigned to the second level KEGG pathway using BLASTx and MEGAN; b-d) correlation in the number of reads assigned to each contig in the database. The results are displayed as a heatmap with the correlation values shown. The correlation for rumen fluid - faeces pairs from the same animal is highlighted.