Schmallenberg virus (SBV) causes fever, diarrhoea and loss of milk production in adult cattle, although the animals do recover.

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These hardworking rural dwellers make their living by herding horses, camels, goats, cattle and sheep for milk, cashmere, meat and other livestock products.

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The settlers worked hard, clearing the forests along the valley floors, and making their living from livestock in a region where few crops grow well, but Alpine meadows are pasture for goats and cattle which produce unrivalled milk and cheese.

BBC: Hiking the Alpine Walserweg trail

Coincidentally, these regions also saw the domestication of cattle and the adoption of milk-drinking by adults around the same time.

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The first minister said that the decision was "disappointing" and stressed that bovine TB was a "serious problem for the milk industry in Wales and had led to the culling of thousands of cattle in recent years".

BBC: First Minister's questions

During his two years of research, Kardashian followed the trail of milk from the small pastoral farms that dot the countryside around his Vermont home to the industrial dairy cattle plants of the Midwest, and 12, 000 years back in time to the dawn of dairy farming.

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