He was ordered to pay vet bills of $954.
Judge Snell commented that Steiner's actions were in the upper limit of this type of offence and that the type of offending and its effect on the industry was significant.
It could easily cause reputation harm to the dairy industry and the individual farming operation involved, he said.
MPI animal welfare and NAIT compliance manager Gray Harrison said the offending first came to light after a mob of dairy cull cows Steiner sent to the meatworks were found to have tail breaks.
"An MPI veterinarian reported the tail breaks, which led us to inspect the remainder of the herd at the dairy farm where Steiner worked."
Of the 313 cows that Steiner physically handled, most were found to have been handled in a way that caused tail breaks.
More than 150 cows were found to have multiple breakages in their tails and 133 were determined to be recent breakages.
In the agreed "Summary of Facts", Steiner's actions were deemed to have caused "unreasonable and unnecessary" pain and distress to the cows in his care.
As a contract milker, it was his responsibility to ensure all animals on the property were handled in a way that minimised pain, distress, and injury – including tail breakages.
Scientific research indicates it would require significantly more force to break a tail than dislocate a finger and the breaking of a tail or twisting would cause immediate, severe pain and distress.
