Comparison of SCFAs levels detected in faeces between the TD and the C-ASD group
We compared the SCFAs levels in the faeces of the TD group and the C-ASD group, including acetate, PPA, butyrate, valerate, isobutyrate, isovalerate, and hexanoate. The results showed that the faecal PPA levels in the C-ASD group were significantly higher than those in the TD group (The levels of acetic, propionate, butyrate, and valerate acid in feces. Each value was presented as the mean ± SEM. 