In a recent press release, USPOULTRY and the USPOULTRY Foundation announced the completion of a funded research project at the University of Arkansas in which researchers evaluated the effects of variable light intensity programs on broiler welfare. David Caldwell, head of the Department of Poultry Science and director of the Center of Excellence for Poultry Science at the University of Arkansas, and his team recently completed the project. The aim of the project was to determine the effects of variable intensity lighting and natural lighting programmes on behaviour, gait score and stress hormone (corticosterone) compared to constant light intensity programmes in commercial broiler farms. Other objectives of the study were to investigate the effect of enrichment hut on broiler behaviour, gait score and stress in the different lighting programmes. The results showed that the variable light intensity lighting programme stimulated dust bathing behaviour and voluntary movement of the birds. In addition, litter moisture content and footpad lesions were lowest in the variable light programme house.
