Dramatic increases in grain and oilseed prices in the last three to four months are affecting cattle feeding operations. July corn futures are currently priced at $5.20/bu compared to weekly cash prices above $4.00/bu in mid-October 2020 and $5.44/bu by mid-January 2021. While the supply of feeder cattle is mostly determined for 2021 according to Derrell S. Peel, Oklahoma State University Extensio…