hiya
mummy should preferably on a hot day be inside..pups will die in excessive heat VERY quickly, maybe in the laundry??
mum should also be having small frequent meals throughout the day..as their calcium levels after having pups can drop dramatically... offer her milk aswell (milk for dogs) and yes she should be having puppy formula food if she is having dog food.
feel free to PM if you have any other questions (i am a registered breeder)