
After 2 episodes I would be weaning now, she could have another drop during the night and you miss it leading to her fitting or worse, put a babygro on her so she can still care for the pups without them getting to suckle and she will gradually dry up.
Is the litter larger than you would expect for the breed which would explain why her body is not coping with the drain on her calcium levels?
Did you give extra calcium during her pregnancy?
The RC mother and baby must be the new name for the Reproduction Starter I have used in the past,Mum starts it at 6 weeks through to her being back into condition, pups are weaned on to it till they are 8weeks old, I used to soak it in warm broth to encourage my girl to eat it and then leave some dry within reach 24/7, as the pups got older and had teeth they would go and try some out of Mums dish.
A handy source of calcium is Tums indigestion remedy, I have heard many mention giving them to bitches in labour, I prefer Calciboost but if not available then I would give the Tums a go.
I hope she remains stable from now on and the pups continue to thrive.