Was she a Yorkie also? If so, Yorkies are EXTREMELY tiny puppies
, and not eating for even one day could cause a drop in
blood sugar. If she had gone a couple of days without eating, it definitely could have killed her. It would not have been possible for her to have starved to death in a couple of days, but when a puppy is being weaned from its mother, its system is not yet totally "in gear" in terms of being on its own.