Mean values and standard deviations of rarefaction curves comparing the number of sequences and OTUs found in the DNA of fillies’ stool.

<p>Groups: IET-1-0: immediately before the first incremental test (blue); IET-1-48: 48 h after the first incremental test (red); IET-2-0: immediately before the second incremental test (green); IET-2-48: 48 h after the second incremental test (purple).