It is advisable that when they are 35 weeks old or earlier the farmer should start raising a replacement flock which shall start laying just when the old flock is being disposed of
zikafika masabata 35 alimi amalangizidwa kuti pa nthawi imeneyo ayambe kusunga nkhuku zina za mazira ndi cholinga chakuti zizidzabweretsa phindu pamene zina zikugulitsidwa