Within the European Union, stocking densities are based on the EU Broiler Welfare Directive (2007):
• 33 kg/m2 (6.7 lb/ft2) or
• 39 kg/m2 (8.0 lb/ft2) if stricter standards are met or
• 42 kg/m2 (8.6 lb/ft2) if exceptionally high welfare standards are met over a prolonged period of time.