Some veileds will/can lay eggs that early and some may never lay eggs....having the container of sand in the cage almost eliminates the need for having to watch the often subtle indications that she is getting ready to lay. Using an opaque container means that she will not see out through the sides if she happens to dig her hole so that it ends up against the side of the cage. I would worry about the screen damaging her claws/toes if the digging continues after she reaches the floor of the container.