As above,
but if they are freshly laid as you say and you found them fast and not left in too wet environment before you found them,
Then I have just a suggestion that others are welcome to dismiss.
It could be a calcium or other calcium absorption vitamin deficiency (e.g D) in the food item,
or even if the she is a first time mother, a deficiency in the mothers ability to absorb relevant Vitamins and/or minerals.
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