Doyun Goo

IntroductionBetween 15 and 20 weeks of age, layer pullets undergo rapid physiological changes, including reproductive tract maturation, ovarian follicles development, increased calcium intake for medullary bone formation, and metabolic and hormonal adjustments to support daily egg production (Xin et al., 2022; Bahry et al., 2023; Noetzold and Zuidhof, 2025). These developmental events impose highe ...

IntroductionWhereas modern broilers have low genetic variation and wellcontrolled rearing environment, there are still high variations in BW within a flock (Lundberg et al., 2021). While uniformity is a universal issue in poultry production, there are still no cost-effective interventions other than culling heavy and small birds to improve uniformity within a broiler flock (Choi et al., 2026). Poo ...