Relative percentages of the most abundant bacterial groups at the various phylogenetic levels (phylum, class, order, family, genus) based on pyrosequencing.

Taxa present in at least 50% of dogs (either healthy or diseased) included in analysis. **p-values adjusted based on the Benjamini and Hochberg False discovery rate. *Medians not sharing a common superscript are significantly different (p<0.05 based on a Dunn’s multiple comparisons test). NHD = acute hemorrhagic diarrhea; AHD = acute hemorrhagic diarrhea; IBD = inflammatory bowel disease.