Dose-dependent modulation of the gut microbiota and metabolome by Astragalus mongholicus micropowder improves growth performance and intestinal health in weaned calves - Baoshan Feng; Hongwei Zhang; Meishu Tan; Yiran Xu; Sen Mao; Man Feng; Gui'e Jiang; Yinghao Zhou; Tingyu Liu; Yanli Chen; Yian Zhao; Hui Zhang; et al. (Animal Feed Science and Technology, 2026)