天气预报 > 其他 > 牛掉毛是怎么回事
牛掉毛是怎么回事
更新时间: 2020-11-03 00:00:00  

大多数动物在春天和秋天都有脱换毛的现象。夏天所需的毛量不必这么多,所以天气回暖时就脱掉部分旧毛,以调节体温。而临冬时就会脱掉粗毛,更换绒毛,以度寒冬。这些都属正常现象。或是寄生虫病引起的。也有的是营养不良引起的。

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