Izzet Kocak, from Turkey, has turned to the high-tech headgear after seeing a study suggesting it makes the cows happier. This, in turn, means they produce more milk.

Kocak says the move is already paying off. He's given the headsets to two of his cows and noted that milk production went up from 22 litres to 27 litres a day.

And what are the cows seeing through the VR goggles? Apparently, it's visions of the outside world.'They are watching a green pasture and it gives them an emotional boost. They are less stressed,' he said.

Izzet has previously used classical music to try and soothe his cattle. But he says he's been so impressed with the headsets, he plans to buy ten more of them.

The headsets were developed with vets and first tested on a farm in Moscow.