On Pete Morgan's Waikato dairy farm, each cow wears a solar-powered, GPS-enabled smart collar.
The prime minister has ruled out any added regulations for virtual fencing technology.
Solar-powered GPS collars, referred to as 'wearables', are widely seen as a big part of the future of farming for dairy cows and beef cattle.
Cows wear electronic collars and their movement is controlled via an app using audio, vibrations and an electric pulse, to stay within the virtual fence.
Companies Halter and Gallagher are leading the charge, exporting collar technology to farmers around the world.
