Pigs feel complex emotions, say scientists

Pigs can feel optimistic and pessimistic according to how they are being treated, scientists revealed today.

Experts from Newcastle University's School of Agriculture, Food and Rural Development found they were just as likely as humans to feel the glass was half empty or half full, depending on their living conditions, as hogs kept in piggy luxury were more likely to respond positively to a new experience than those in less stimulating pens.