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Some fun facts about cows!! Cows are referred to as the foster mothers of the human race because they produce most of the milk that people drink. The first cow in America arrived in Jamestown colony in 1611. Until the 1850's, nearly every family had its own cow. The first regular shipment of milk by railroad was between Orange County, New York, and New York City and began in 1841. In 1856, Gail Borden invented the condensed milk process. This process removed some of the water from milk so it would take up less space. Refrigeration came into use in 1880, and the first pasteurizing machine was introduced in 1895. Dairying has improved through the years. Today, one cow can produce the milk that it once took 10 cows to produce. Cows are milked for an average of 3-4 years.A cow must have a calf in order to produce milk.Calves are fed milk until they are 8-9 weeks old. The average cow is 2 years old when she has her first calf. Calves are fed milk until they are 8-9 weeks old. A young female cow is called a heifer.