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.