THE Jersey cow, a small, honey-brown bovine that is prized by farmers for the abundance of buttery, high-fat milk it produces, is one of the fastest-growing breeds in the world.

泽西牛是目前世界上繁殖速度最快的一种牛，这种小型棕黄色牛因为黄油产量以及高脂牛奶产量均非常丰富而受到农夫们的欢迎。

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On average a single cow produces 6.5 gallons of milk every day from two 10-minute milkings using mechanical vacuum machines that are attached to their udders.

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

The vast majority of dairy cows in the country are Holsteins, a breed that typically produces more milk per cow than others.

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