"We want to get the message across that continuation of this illegal practice may attract prosecution. This includes horse owners who allow the illegal castration of their horses, and people performing illegal castration of horses."
Horse castration, or gelding, has been regarded as a significant surgical procedure for more than 50 years.
It is only allowed to be carried out by a veterinarian.
Under the Animal Welfare Act 1999, the penalties for performing the procedure illegally are a maximum fine of $50,000 or 12 months imprisonment.
Mr Green said those who were carrying out illegal castrations could not plead ignorance of the law.
"There are no excuses for anyone being unaware of its status."
- Herald online