The fire was reported Wednesday afternoon at the Wahoo Locker Plant, and it took firefighters more than two hours to put out the blaze.
Saunders County Sheriff Kevin Stukenholtz says an explosion caused the fire, which quickly moved into an adjacent storage building.
At least 80 firefighters from several area fire departments responded to the blaze.
The cause of the fire is under investigation.
Wahoo is about 30 miles west of Omaha.