Where milk comes from and how it's made. It all starts with healthy, well-fed cows that live on farms all around America the beautiful. A cow can't give milk until she's given birth to a calf .
Cows are BIG eaters.
A cow that chows on only grass can make 50 glasses of milk a day. Milking Cows Cows have been called nature's own milk factory on four hooves. Today, farmers use machines to milk more than 100 cows per hour. Many farms also have computers to help track how much milk a cow makes. After milking, the milk is cooled to 45 degrees Fahrenheit.