The Ministry for Primary Industries has laid further animal welfare charges over an investigation into mistreatment of bobby calves in the Waikato.
In March the ministry laid 10 charges against an individual, after it last year received hours of footage containing alleged offences.
Now four representative charges have been laid against a company and another person in the Huntly District Court.
In November, animal welfare group SAFE went public, releasing a video which showed bobby calves being roughly handled.
They were thrown, kicked, beaten and filmed dead in cages.
SAFE had set up hidden video cameras across 12 farms and a slaughter house, saying bobby calves were simply treated as a waste product by the dairy industry.
It later took out a graphic full-page advertisement in the UK Guardian newspaper showing a picture of a bobby calf immersed in a blood-streaked glass of milk under the headline "New Zealand dairy contaminated with cruelty".
MPI spokesman Steve Gilbert says the investigation has been careful, methodical, and is ongoing.
Both the person charged in March, and the company and person facing the latest charges are due in court in June.