However, they still rely heavily on their mother's milk for nutrition until they are around 3 weeks old.
Here's a breakdown:
* 0-14 days: Pups are completely dependent on their mother's milk.
* 14-21 days: Pups start to nibble on solid food, but still need their mother's milk.
* 21-28 days: Pups can fully wean from their mother and eat a regular gerbil diet.
It's important to remember that these are just guidelines, and individual pups may vary. Some pups may start eating solid food earlier, while others might take a bit longer.