Freezing weather in spring hampered the hens' ability to lay.春天严寒的天气降低了母鸡的产蛋能力。Birds make nests in preparation for breeding.鸟类筑巢准备产蛋。The hens stopped laying in winter.这些母鸡冬天停止了产蛋。Such treatment will prod chickens into higher egg production.这种处理会刺激母鸡增加产蛋量。