A pig's 'mood' can show us how content he is, say researchers at Newcastle's School of Agriculture, Food and Rural Development.
Led by Dr Catherine Douglas, the team has employed a technique to 'ask' pigs if they are feeling optimistic or pessimistic about life as a result of the way in which they live and their results say that pigs are capable of complex emotions which are directly influenced by their living conditions.
The Newcastle team taught the pigs to associate a note on a glockenspiel with a treat (an apple) and a dog training 'clicker' with something unpleasant – rustling a plastic bag.
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