The U.S. and Iowa hog and pig inventory shows farmers are interested in raising more hogs as prices soar, analyst said. The report, however, didn’t show a clear impact of the porcine epidemic diarrhea virus (PEDV) on the U.S. swine herd.

The United States inventory of all hogs and pigs on March 1, 2014 was 62.9 million head, the...