70 70 10–16 / 17 WEEKS: GUT & FEED INTAKE DEVELOPMENT BODY COMPOSITION Body composition will be influenced by the density of the feed and the level of protein during this phase. Any attempt to recover live weight from 11 weeks onwards through nutritional modification could improve feed conversion but could adversely affect the amount of body fat deposition: greater fat accumulation during this period will negatively impact the productivity of the flock. FEED Use feeds moderate in energy (≤ 2750 kcal/kg) which, in addition to promoting consumption, allow the incorporation of fibrous raw materials that stimulate the development and capacity of the digestive system. To support this, it’s advisable to include a minimum of insoluble fibre into the diet (Neutral Detergent Fibre ≥ 14.5 %). During the transfer of birds from the rearing house to the laying house, it is also crucial to minimise changes in the structure (both macro and micro) of the feed. A sudden change in structure, from coarse (> 2.36 mm ø) to fine (< 0.60 mm ø), can cause a reduction in consumption of up to 28%, that may lead to weight loss and affect onset of lay and later performance. BODY WEIGHT & BODY COMPOSITION Lohmann Brown Classic constituents’ weekly growth Protein Fat Ash LOHMANN › MANAGEMENT GUIDE › NUTRITION › PREPARATION PERIOD 1 0 1 2 3 4 5 6 7 2 3 4 5 6 7 8 9 10111213 14151617 18192021222324252627282930 Adapted from Neme et al., 2006. grams / hen / day Weeks of age
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