Free Range eggs are also laid by hens that enjoy the freedom of a hen-house, but have the added benefit of access to an outside run.
2
对榆林市不同生态环境下散养鸡的寄生虫进行比较详细的调查。
Parasites communitiy survey of scattered chicken in different ecological environment of Yu- lin Shows there are 6 species enboroa and 8 species ectoroa.
3
原本通过消毒可以清除的病原体，在散养鸡笼内得以大量增殖。
Pathogens that could be removed by disinfection in the shed would continue to build up on the range.
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