Suit writes "A report from a Swedish-Norwegian research group, led by professor Per Jensen at Linköping university in Sweden, shows that chickens can actually inherit behavioural modifications induced by stress in their parents. The scientists grew groups of chickens under stressful conditions, where a randomly fluctuating day-night rhythm made access to food and resting perches unpredictable. This caused a marked decrease in the ability of the stressed birds to solve a spatial learning task. Remarkably, their offspring also had a decreased learning ability, in spite of being kept under non-stress conditions from the point of egg-laying. They were also more competitive and grew faster than offspring of non-stressed birds."