Broiler parent birds are kept in chronic hunger throughout their productive lives to prevent the obesity that would impair their reproduction - this is a major unresolved welfare issue.
Broiler parent flock hunger represents one of the most ethically challenging issues in commercial poultry production. These animals experience sustained, chronic frustration of a fundamental drive - hunger - throughout their breeding lives. Unlike production problems that can be fixed through management, this issue is genetically embedded in commercial broiler breeds. Long-term resolution requires breed change. Short-term mitigations include qualitative restriction (bulky low-energy diets) that allow more eating time while limiting calorie intake.