It's important to remember that:
* Handling baby mice can be very stressful for them, and you risk causing them injury. They are incredibly delicate, and their mothers can become aggressive if they sense danger to their young.
* Distinguishing the sex of very young mice is incredibly difficult and not recommended. Even experienced breeders often have trouble telling the difference until the mice are a few weeks old.
If you need to identify the sex of your baby mice, please consult a veterinarian or a qualified expert in mouse care. They can safely and accurately determine the sex of your mice without causing them harm.
Remember, the well-being of the mice is paramount. Always prioritize their safety and health over trying to identify their sex too early.