If I'm understanding correctly, Nutri-Cal is a sugary substance with a high glycemic value. It is best used to help regulate a pups blood sugar, which
could be a problem during whelping, but is much more likely with the pups than with mama. The bitch normally requires more complete nutrition to keep her strength up. There is a recipe for a whelping pudding that uses goats milk in a sticky at the top of the breeder section. I hear that it's pretty good