By Mona Lange McCroskey
David Jenner first became interested in the cattle business when his parents, who lived in a Chicago suburb, bought a farm west of the city. It was a farmer-feeder operation where they raised crops and brought cattle in from the west, fed them and then sold them as fat cattle. As Jenner grew up, he took more and more of an interest in the farm, and he got along well with the farmer who ran the business for his family.