The effect of the administration of Bacillus amyloliquefaciens-9 on milk performance and somatic cell count (SCC) in three groups: fed with basal diet (CS) basal diet with 0.3% (w/w) Bacillus amyloliquefaciens-9 (GB-9) (BS), and basal diet with 0.3% (w/w) Radix Tetrastigmae powder (RS) at week 0 and week 6. (A) Milk yield. (B) Dry matter intake. (C) The concentrations of milk protein. (D) The concentrations of milk fat. (E) The concentrations of milk lactose. (F) The value of SCC. Statistical analyses were performed using the ANOVA with the SPSS software (SPSS v.19, SPSS Inc., Chicago, IL, USA). Data were presented as mean ± SEM. * p < 0.05 was considered statistically significant compared with CS group.