AUTHOR=Gao Hang , Xiao Jinzhi , Zhang Qi , Man Hutianlin , Tang Xingyi , Wang Zhouyuan , Fang Rendong , Jiang Sha TITLE=Effect of supplementation continuously in pullet and early lay period with Bacillus subtilis and yeast cell wall on the intestinal morphology, bone parameters, and egg quality of hens JOURNAL=Frontiers in Veterinary Science VOLUME=Volume 12 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2025.1584627 DOI=10.3389/fvets.2025.1584627 ISSN=2297-1769