Cows are wearing solar-powered GPS smart collars on many farms as part of virtual fencing systems.
There's a split of opinion among vets, farmers and animal welfare groups around animal welfare associated with virtual fencing.
The 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.
Many farmers strongly support the technology, others are erring on the side of caution, and some are firmly opposed to one of farming's most significant recent developments.
