Behavioural Priorities of Laying Hens

This article reviews the behavioural requirements of laying hens. It primarily concentrates on evidence from consumer demand studies and relates this to the behavioural and physical consequences of denying hens opportunities to express certain activities. Hens clearly place a high value on food and this provides a useful yardstick for assessing the value of other resources. Hens have been found to work for access to a range of additional...