The Norn Egg Layer is the Creatures 3 machine that dispenses norn eggs. Compare with the DS Muco. Sometimes if a creature hits the Norn Egg Layer, a bug autokills it leaving the hand no artificial source of norn eggs. This bug rarely occurs and means that if some form of spreading disease kills all your norns you have no choice but to import some more. The easiest way to cure this bug is to export all your existing norns and re-make the world, or to install the Norn Egg Layer Backup agent.