allen says there is plenty of calcium in the CGD, but i still add a pinch of calcium to the CGD when i mix it up the feeding after a female lays her eggs, especially first time layers.
good thing you noticed it quick. i will also take each female out after everytime she lays to watch her motions and to see if she is shaky at all. i had a bad incident where a female almost died from a calcium crash so i take it pretty seriously on my inspections.
good luck and just keep a good eye on her.
here's my female named 'orangie' that i am extremely surprised didn't die, now she lays perfect eggs still.

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