Council Directive 2007/43/CE (June 2007) lays down minimum rules for the protection of chickens kept for meat production. It aims to reduce the overcrowding of chicken holdings by setting a maximum stocking density and ensure better animal welfare by specifying requirements such as lighting, litter, feeding, and ventilation.
This was the first time that 'Welfare Indicators' were included in animal welfare legislation as a means of scientific assessment.
For full details please refer to the directive.
For details of the scientific opinion supporting the legislation (which was provided by the predecessor of EFSA, the Scientific Committee on Animal Health and Animal Welfare) please refer to the EFSA page.