"That is not to say they were in prime condition. These were dairy cows that were being culled from the herd and being sent for processing," he said.
Bright said the cows' condition was acceptable for transporting and for processing. He said staff visited the farm the cows came from and found no animal welfare issues.
Staff spoke to the farmer's vet and stock agent who both expressed confidence in the practice on the farm and the reputation of the farmer.
"We found that the 50 cows were inspected by a veterinarian when they arrived at the processing plant, who found no issues with poor body condition," he said.
The complaint arose from a member of the public, who took a picture of the cow and displayed them on a Facebook page.
Federated Farmers dairy section chairman Andrew Hoggard said the incident served as a reminder to farmers not be complacent about welfare. "Just because you don't get prosecuted, or your critics might have ulterior motives, doesn't absolve you from your responsibilities," he said in a statement.