
I mistakenly started extra calcium[daily yoghurt] for my first bitch I ever mated and was told once I had started I had to continue, at 7 weeks realised she was having a phantom so never found out what problems I may have caused, giving the extra calcium stops her processing the normal levels properly if that extra is stopped for any reason.
Now they get their normal diet till 6 weeks when they change over to puppy kibble, more calories in a smaller amount of food, during labour I give vet drops and calciboost every hour[advice from mentors in my breed] to keep energy/calcium levels up and maintain good strong contractions throughout, when the whelping is complete then she gets goats milk to drink[won't drink plain water],cottage cheese and yoghurt added to the kibble and anything else she will eat if faddy, the calciboost is kept on standby should I suspect there are any signs of eclampsia, so far this regime has worked and no vet intervention has been required.
Maybe you should contact a mentor in your breed and see what is normal for them during pregnancy and beyond.