Anims eat any food they cross over, if they are hungry. Fungs get eaten first, then an egg if there is one. So fungs can help protect eggs. Anims eating their own eggs can be a survival trait in certain environments. This behavior can help limit competition with offspring for food, and can help limit overpopulation. This is especially true on small islands or enclosed spaces. Matriphagy, and infanticide can also be survival traits.

If you pay close attention, you might observe anim brain configurations that mitigate ovicide. A good guess might be stress relationships, since birth lowers nutrients and likely gives rise to heightened stress. Stress has an effect on a creature's attraction to movement.