Purina Mills, LLC is the farm animal feeds unit of Land O' Lakes. It was previously part of Ralston Purina, until the U.S. animal feeds portion was first sold in 1986.
History
Purina traces its roots back to 1894, when founder William H. Danforth began producing feed for various farm animals under the name Purina Mills. The predominant brand for each animal was generally referred to as "Chow"; hence there was "Purina Horse Chow", "Purina Dog Chow", "Purina Cat Chow", "Purina Rabbit Chow", "Purina Pig Chow", and even "Purina Monkey Chow". Later, in 1902, he merged with university professor Webster Edgerly, founder of Ralstonism, who was at the time producing breakfast cereals, to form the "Ralston Purina Company".[1]
Ralston Purina sold Purina Mills, the U.S. animal feed business, to BP in 1986, while retaining the pet food and international animal feed businesses. In 1993, the Sterling Group of Houston led a leveraged buyout of Purina Mills. In 1998, it was purchased by Koch Industries