Broiler breeder birds - parent stock of commercial chickens - face severe chronic hunger from feed restriction programs designed to prevent obesity-related mortality.
Broiler breeder welfare represents one of the most severe and poorly publicized welfare problems in commercial poultry. The parent birds of all commercial chicken meat are kept chronically hungry - an essential consequence of breeding birds for such extreme growth rates that they would die of heart failure or metabolic disease if allowed to eat freely. This chronic hunger is measured as a persistent negative affective state lasting for months throughout the productive life of billions of parent birds. The solution lies in selecting slower-growing broiler breeds.