动物保健板块10月28日跌0.47%，申联生物领跌，主力资金净流出8139.32万元

Core Insights - The animal health sector experienced a decline of 0.47% on October 28, with Shenyuan Biological leading the drop [1][2] - The Shanghai Composite Index closed at 3988.22, down 0.22%, while the Shenzhen Component Index closed at 13430.1, down 0.44% [1] Stock Performance - Zhongmu Co., Ltd. (600195) saw a closing price of 7.78, with an increase of 4.71% and a trading volume of 346,700 shares, amounting to a transaction value of 269 million yuan [1] - Xianfeng Holdings (002141) closed at 4.16, up 2.72%, with a trading volume of 394,400 shares [1] - Ruipu Biological (300119) closed at 21.55, up 1.03%, with a trading volume of 127,300 shares [1] - Shenyuan Biological (688098) closed at 10.30, down 6.36%, with a trading volume of 168,900 shares and a transaction value of 176 million yuan [2] - Biological Shares (600201) closed at 10.63, down 4.06%, with a trading volume of 380,700 shares [2] Capital Flow - The animal health sector saw a net outflow of 81.39 million yuan from institutional investors, while retail investors had a net inflow of 71.62 million yuan [2][3] - The capital flow for individual stocks showed that Ruipu Biological had a net inflow of 15.04 million yuan from institutional investors, while it faced a net outflow of 25.78 million yuan from retail investors [3] - Shenyuan Biological experienced a net outflow of 5.53 million yuan from institutional investors, with a net inflow of 6.62 million yuan from retail investors [3]