Your first days, weeks and even months can be an emotional roller coaster!
Having just experienced the postpartum stage again for the fourth time, I can honestly say that sometimes even preparing does not seem to help. You are preparing for something you have no idea how it will present itself. Your birth is unpredictable, and so is postpartum.
When there is anyone other then Mom or Dad supervising a baby in the home there is likely to be a change in dynamics for the dog. Dogs are sensitive to the changing of people coming and going. Some dogs, more then others.
This is often reflected in articles of major dog bite incidents that hit the news. Many times it is not the parent who is the caretaker when the bite takes place. Some reason for this may be:
The caretaker is less familiar with the dogs responses and signs indicating stress or agitation.