这可以使这一对正常交配同时也阻止雌禽待在窝里。
This allows the pair to mate properly and stops the hen from staying in the nest.
本试验发现雄禽比雌禽易感，发病率高。
The morbidity and mortality rates of male poultry were higher than that of female one.
但是据迪安博士说，精明的雌禽也有对付这种战术的方法。
But according to Dr Dean, the shrewd females have worked out a way of dealing with this tactic as well.
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