Hi everyone, I have more questions

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1. Once the puppies are born, how soon can they come into contact with the daddy and my other dog?
2. What else can I use to tie the umbilical cord? My friend was supposed to send me hemostats and she didn't come through for me.
3. When should mommy and puppies be taken to the vet?
4. What is a good way to identify each puppy?
I'm sure I'll think of more