Fig. 6

Targeted metabolomic analyses of SCFAs levels using GC–MS in laying hens. A SCFAs concentration in cecal contents of laying hens. B Correlation analysis of SCFAs concentration and the differentially abundant bacteria. Red represents positive correlations and blue represents negative correlations. ^*P < 0.05, ^**P < 0.01, ^***P < 0.001. n = 10 hens per group