
Why give mum extra milk, of any kind? We've never done that. Whelpie etc. is for puppies - bitch replacement milk and isn't intended to be given to mum Provided she has enough food, a good quality food (probably her normal food but more often perhaps and maybe more protein if the milk supply falters), to produce enough milk for her litter that should be more than enough. And the puppies shouldn't need supplementing unless she has a huge litter where she might need some help, or her supply isn't available for some reason. In other words no Whelpie etc., unless needed. None of mine had any, ever. They, the puppies were weaned starting with warmed goats milk, teaching each one to lap and then moving on to mixing that, or just water, with a good quality puppy food to make a porridge.
Goats milk is similar in make up to bitch milk and much cheaper than bitch replacer milk.
ps With those who didn't have a C.Section (when they got none), we limited the number of placenta our girls had because it's very rich and can give them the runs. It was only needed with dogs in the wild (and other animals) to sustain them until they could go out hunting again.