Egg safety is equally ambiguous. While many people like to buy cage-free eggs, those chickens may be exposed to bacteria on the grounds where they are roaming.
For example, to call chickens "free range," a company "must demonstrate to the Agency that the poultry has been allowed access to the outside," according to USDA regulations.
3
散养的鸡四处抛食，一个星期可以下1-2个蛋，饲料成本为零，一年可以净得50—100个鸡蛋。
A free-range hen scratching around might lay one or two eggs a week. Feeding her costs nothing, giving a net gain of 50-100 eggs a year.
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