the puppies are close to each other while lying down, they are also called contact lying, the puppies automatically seek physical contact with their siblings.
For the first few weeks, the mother of the puppies seeks close contact with them, which then diminishes over time and is limited to shorter periods.
As already mentioned, in this first phase of life contact is very important to people as well as to other animal roommates.
A well-socialized puppy later turns into a balanced young dog and after a few years a proud, well socialized full-grown dog and a joy for every owner and his environment.
Here you can read the other parts of dogtraining:
Part1: https://steemit.com/animalphotography/@zanoni/dogtraining1-dog-school-even-a-dog-have-to-learn
Part2 :https://steemit.com/animalphotography/@zanoni/dogtraining2-from-a-puppy-to-a-well-educated-adult-dog