Population Control Norn

The Population Control Norns are a genetic breed by Marcus K. As their name suggests, they have a built-in population control: the females can lay a maximum of four eggs, and then they die. Other features include:
 * Additional, modified immune system that helps them survive severe illness and poisoning by falling asleep
 * Longer lifespan than usual
 * Natural fear of water
 * Shy and timid in nature
 * Males can, however, act defensively if attacked when a female or egg is nearby
 * They don't need Norn Home smell to feel at home; the scent of food does that for them

They are available at Mummy's Creatures. They use Civet Norn, Zebra Norn, and Fimbul Norn sprites - females with Fimbul heads can only lay two eggs, females with Civet heads can lay three, and females with Zebra heads can lay up to four eggs.