
Hello White Lilly,
If the pups are eating poo it is usually because they are hungry. You could increase the ND to 4 meals a day, supplemented with mums milk in between. If they are not hungry they will just walk away from the food. Don't forget that as puppies grow they loose the enzyme that allows them to tolerate/digest milk so they may well be better on the ND and not as much milk as before.
I am sorry to read of all your problems with mum, but hope it all goes okay from now on.
Forgot to add that once you begin weaning fresh water should be available, take it up when you are not able to monitor what the pups are doing, you do not want one to fall asleep in it, and take up last thing at night.