Drivers hauling pigs to the Swift & Company plant in Worthington, Minnesota were at a standstill for hours Wednesday.

Plant officials won't say why, but the Department of Agriculture shut the plant down for about 14 hours.

Ivan DeJong was fed up. He was at the plant at 8 a.m. ready to drop off his load. At 2:30 he was still sitting.

"Terribly frustrated to get held up for a silly reason," said Ivan.

USDA officials say the plant was shut down for a humane handling violation about midnight Tuesday night and they were able to resume operations about 2:30 Wednesday afternoon. Drivers tell KSFY they believe it was an issue with how one pig was killed.

"Silly reason as shooting down the hog, because one may have been hurt at the same time they're not even sure what was the problem. We've got a thousand hogs and we're here with nowhere to go," said Ivan.

Ivan tells KSFY he thinks he lost about $800 in the time he had to sit. In order to reopen Wednesday afternoon, Swift & Company had to submit a plan to fix the violation to USDA. A USDA spokesperson also says inspectors will be looking very closely at the pigs coming in who were sitting in the sun all day to make sure they haven't been damaged by the heat. This is also the second violation this plant has had for humane handling since April.