A cow eats about 90 pounds of food each day and she drinks 25-50 gallons of water a day. There are about 11 million milk cows in America. Cows are milked at least twice each day. Each time cows are milked, the dairy farmers wash the cows and the milking machines. They do this to keep the milk clean.
Milk is taken from the farm to the dairy plant in a tank truck.
Machines at the dairy plant keep your milk clean and safe. No hands touch milk from the cow to your carton. In 1856, Dr. Louis Pasteur discovered that heat killed bad germs. That makes it very safe to drink. Even at the dairy plant, milk is checked again and again.