Fig. 4From: Changes in feeding habits promoted the differentiation of the composition and function of gut microbiotas between domestic dogs (Canis lupus familiaris) and gray wolves (Canis lupus)The relative abundance of functionally annotated genes at level 1 a based on the CAZy database and b based on the KEGG database. The vertical axis represents the relative proportion of comments to a functional class. The horizontal axis represents the sample name. The functional categories corresponding to each color block are shown in the figure on the rightBack to article page