On Sept. 1, there were 21.2 million hogs and pigs on Iowa farms, according the latest U.S. Department of Agriculture (USDA) National Agricultural Statistics Service hogs and pigs report released last week. The Sept. 1 inventory was up 2 percent from a year ago and became the highest inventory on record.

The U.S. inventory of all hogs and pigs on Sept. 1 was 68.4...