The combination of dietary active dry yeast and <i>Bacillus subtilis</i> improves productive performance, egg quality, and immunity of aged breeder hens.

ABSTRACT: This study aimed to investigate the effects of dietary supplementation with active dry yeast (ADY) alone or in combination with Bacillus subtilis (BS) on physiological parameters (laying performance, egg quality, blood indexes), reproductive traits, ileum microbiome, metabolome, and uterine gene expression in aged breeder hens. A total of 336 Hy-line brown layer hens aged 55 weeks were randomly assigned to three groups using a completely randomized design: control group (Con, basal diet), ADY group (1 g ADY/kg diet), and ADY-BS combination group ([1 g ADY + 0.1 g BS]/kg diet). Compared with the Con group, ADY-BS group significantly improved egg production (P = 0.024) and reduced feed conversion ratio (P = 0.034), while also significantly increasing feed intake compared

SUBMITTER: Liu Y 

PROVIDER: S-EPMC12395076 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature