The welfare emergency hidden at the top of the poultry supply chain
Every commercial broiler chicken (raised for meat) is the offspring of "parent stock" — breeding birds maintained specifically to produce fertile eggs. These parent stock birds carry the same genetics as their fast-growing offspring, meaning they have strong appetite drives and rapid growth physiology. To prevent them from growing too fat to reproduce, the industry feeds them at 25-40% of what they would voluntarily eat — causing chronic, severe hunger throughout their 40-60 week productive lives.
Research from Edinburgh, Bristol, and other leading welfare institutions documents the suffering comprehensively. Restricted birds spend more time performing food-seeking behaviors, show abnormal stereotypies related to frustration, and have elevated stress hormone levels. The motivation to eat is not diminished by restriction — it remains intense throughout the birds' lives.
Approximately 140 million broiler parent stock birds are maintained worldwide at any time. Given their 40-60 week productive lives and continuous replacement, hundreds of millions of animals experience this chronic condition annually. Yet this population receives almost no regulatory attention — welfare standards focus on broilers and laying hens, largely ignoring parent stock.