pigs

Breeding special pigs for this is ideal, say experts, since their organs are roughly the right size for people.

"So far, we have learnt that the people of Keeladi were involved in agriculture, trade and cattle-rearing. They kept deer, goats and wild pigs and ate lots of rice and millets," says Prof Kumaresan.

Lewis Clare, who produces organic oats and pigs on his 160-acre farm near Manchester, said: "The weather is going to be driving costs up."

Other farmers have told the BBC about joyriders high on drugs driving off in their tractors and pigs being killed with crossbows.

How much longer would the world have black Spanish pigs, fed nothing but acorns and chestnuts?