European hunter-gatherers acquired domesticated pigs from nearby farmers as early as 4600 BC, according to new evidence. The international team of scientists showed there was interaction between the hunter-gatherer and farming communities and a 'sharing' of animals and knowledge. The interaction between the two groups eventually led to the hunter-gatherers incorporating farming and breeding of livestock into their culture, say the scientists.

Source: European hunter-gatherers owned pigs as early as 4600 BC