38 38 LOHMANN › MANAGEMENT GUIDE › EARLY MANAGEMENT EARLY DEVELOPMENT The initial weeks are crucial for the development of organs and the immune system. Rapid growth during this period is essential to reach body weight targets and ensure good uniformity and liveability. Key management practices include maintaining optimal temperature, humidity, and lighting conditions, ensuring access to clean water and high-quality feed, and monitoring chick behaviour and crop fill to ensure proper feed and water intake. GROWTH PHASE During this phase, the focus shifts to skeletal and muscle development. Achieving the correct body weight and uniformity is critical. Management practices include providing adequate feeder and drinker space, maintaining appropriate stocking densities, and implementing a lighting programme that supports growth. Feed intake training and the use of insoluble grit can help develop the digestive system and improve feed efficiency. ONSET DEVELOPMENT This period is characterised by the development of the reproductive system and the medullary bone, which is essential for calcium storage. Monitoring body weight and uniformity is crucial, and adjustments to feed and lighting programmes may be necessary to ensure optimal development. STAGE 1: 0–10 WEEKS STAGE 2: 10 0 3 10 PARENT STOCK DEVELOPMENT THROUGH THE PREPARATION PERIOD Weeks of age 5
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