@Zenzen Mistori I know it's hard I have experienced it as well when I pet gave birth to 7 puppies and they all died one by one the same way as you said but one is alive till this day and now she herself have given birth to 3 babies twice
And she is a great mom
The only thing I can say is
Time will heal everything
You and your dog both of you need be be strong to save the puppy even if it's one
And she is a great mom
The only thing I can say is
Time will heal everything
You and your dog both of you need be be strong to save the puppy even if it's one