Here's why:
* Socialization: During this time, puppies learn essential social skills from their littermates and mother, like bite inhibition and how to interact with other dogs.
* Nursing: Puppies rely on their mother's milk for essential nutrients and antibodies that build their immune system.
* Learning: Puppies learn from their mother about basic hygiene, how to play, and how to behave in a pack.
It's crucial for a puppy's development to stay with its mother during this critical period.