Base treatment protocols on the cow's treatment history; length of the infection; and cow age, health status and lactation stage.

治疗方案基于奶牛的治疗史，感染时间长度，和奶牛的年龄、健康状况和泌乳期。

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Milk quality is affected by several factors such as feed and feeding, milk lactation stage and milk performance, environment, diseases and breed.

牛奶品质的优劣受诸多因素的影响，如饲料组成与营养、奶牛泌乳阶段与水平、环境、疾病、品种等。

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The milk quality was affected by several factors such as feed and feeding, milk lactation stage sad milk performance, environment, diseases and breed.

牛奶品质的优势，受诸多因素的影响，如饲料组成与营养、牛奶泌乳阶段与水平、环境、疾病、品种等。

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The fat content of raw milk varies with cow breed, feed, and stage of lactation among other factors.

FORBES: Why Milk Isn't As "Natural" As You Think