Decreasing egg weight by energy or protein restriction and energy required for repletion1

Abstract
A diet containing 110 g crude protein/kg caused smaller losses in egg wt, numbers and body wt in Babcock B300 layers than diets containing 90 g protein/kg, 6.56 MJ ME[metabolizable energy]/kg or 7.90 MJ/kg. Sequence of repletion of depleted birds was body wt, egg wt and egg number. For the 1st alone more than 420 kJ/d [day] was required, for body wt and egg wt more than 630 kJ/d and for all 3 more than 1170 kJ/d.