This is a critical period where they are completely dependent on their mother for survival. During this time, they:
* Cannot regulate their body temperature and need to be kept warm.
* Cannot see or hear properly.
* Cannot urinate or defecate on their own. They need to be stimulated by the mother.
* Cannot stand or walk properly.
It's important to note that these are general guidelines, and individual puppies may develop at slightly different paces.