For the second part of the production until depletion,
energy concentration must be decreased to prevent
fattening, improve feathering and livability. Lower energy
diets contain more insoluble fibre, increase consumption
time and affect bird behaviour (see ‘Fiber for laying
hen’ section). However diets with lower energy values
increase feed consumption. Observing local regulations
and raw material availability, a compromise between
feed intake/FCR, bird behaviour and bird bodyweight
must be found. Classical energy feed range, observed
after 35 weeks of age, are from 2600 to 2750 kcal/kg.