Frontier Mills is a family-owned feed mill founded in 1989 in Yankton, South Dakota. The company serves livestock producers in South Dakota, Nebraska, Iowa, Minnesota and Montana, partnering directly with farmers to formulate and deliver high-quality feed and supplements for cattle, swine and other livestock. Services include custom feed blending, ration formulation, feed testing and on-site nutritional consultation to optimize animal performance. The facility features grain storage, pelleting equipment and a forage testing lab, allowing Frontier Mills to produce balanced feeds tailored to each customer. It operates its own truck fleet for timely deliveries from its office at 2002 SD Highway 314, Yankton, SD 57078, with office phone (605) 665-2441 and toll-free (800) 955-2441.