Broiler parent birds are severely feed-restricted to control their weight, causing chronic hunger that is one of the most severe welfare problems in poultry farming.
Broiler parent birds experience the worst of two welfare worlds: bred for rapid growth causing structural problems, yet severely feed-restricted causing chronic hunger. Feed-restricted breeders show persistent food-seeking behavior, aggression at feeder access, and behavioral indicators of chronic frustration. The welfare dilemma is fundamental to the genetics: solving it requires breeding reform rather than just management changes.