This Capstone Research review investigates how pullet-rearing practices influence the transition to cage-free egg production systems in the United States. The hypothesis is that enhancing rearing conditions for pullets-such as providing physical activity, cognitive stimulation, environmental enrichment, and stress management-will improve their welfare and adaptability, thus supporting a successful transition to cage-free systems. The approach involved a comprehensive review of scientific literature, industry practices, and existing guidelines, with a focus on physiological parameters, natural behaviors, and emotional states. Key findings indicate that early-life interventions significantly enhance the welfare and adaptability of pullets, reducing the risk of behavioral and physical complications in adult hens. The results support the conclusion that legislative and industry efforts must advocate for cage-free pullet rearing to achieve the full benefits of cage-free systems. Despite the importance of this life phase, current legislations often exclude the juvenile hen, although many third-party certification programs have recognized its significance. This study advocates for integrating pullet-specific rearing standards into future legislation and certification programs to ensure a holistic improvement in poultry welfare.