Iowa Code § 481A.57: Possession and storage.

A person having lawful possession of game or fur-bearing animals or their pelts lawfully taken by that person with a valid hunting or trapping license, may hold, possess, or store the game or fur-bearing animals or their pelts in an amount that does not exceed the possession limit for the game or fur-bearing animal, from the date of taking until the day before the first day of the next open season for that game or fur-bearing animal. Any person may possess up to twenty-five pounds of deer venison if the deer was obtained from a lawful source.