Pullet rearing conditions before the laying period significantly affect adult hen welfare. Early exposure to aviary systems prevents fear responses and injuries in adult flocks.
Pullet rearing welfare is an upstream determinant of adult hen welfare outcomes. Hens transferred from cage rearing to aviary laying systems at 18 weeks must navigate complex multi-level environments they have no experience with, resulting in falls, injuries, and behavioral fear. Matching rearing to laying environment is a systemic welfare improvement that reduces harm without additional infrastructure cost.