James Harris, 37, was hit in the leg Saturday, the opening day of pheasant season, said Alan Foster, a spokesman with the Iowa Department of Natural Resources.
"He had surgery and is doing pretty well," he said. "He took between 100-120 pellets in about a 4-inch (10-centimeter) circle to his calf."
Harris was listed in good condition Tuesday, officials at University Hospitals in Iowa City said.
Harris was hunting with a group when he went to get a bird the group had shot. Harris put his gun on the ground and as he was crossing a fence, his hunting dog stepped on the gun, Foster said.
The gun was about 3 feet (0.91 meter) away from his leg.
"The muzzle velocity is so great that the pellets don't have a chance to spread out," he said.
No one else was hurt, and the dog was not injured.
Foster said no citations have been issued.
The troops of the Southern and Western military districts will begin to return from Russia's southern borders to the points of their permanent deployment starting April 23