Stillwater Milling Company is one of the largest independent feed mills in the state of Oklahoma. The company manufactures a variety of livestock feed under the A&M logo, including beef cattle feeds, dairy cattle feeds, swine feeds, horse feeds, poultry feeds, sheep and goat feeds, pet food and liquid feed supplements. Stillwater Milling Company direct markets A&M feeds to ranchers and farmers in Oklahoma, Kansas, Arkansas and Texas. It also supplies feed to more than 100 dealer locations. The forerunner of Stillwater Milling Company was the Thomas and Plummer Perfection Mills, which was established in 1891 to mill wheat into flour and corn into corn meal for use in the home.