* Re-nesting: Mama mice will often move their babies to a new nest if the original one becomes compromised. This can look like she's eating them, but she's actually carrying them to a safer location.
* Cleaning: Mama mice will clean their babies regularly, including licking them. This can look like she's eating them, especially if you're not familiar with the process.
* Sadly, sometimes babies are stillborn or weak. A mama mouse may eat a dead or very weak baby to prevent attracting predators or spreading disease.
Never interfere with a mama mouse and her babies. It's best to leave them alone and observe from a safe distance. If you're concerned about their welfare, it's best to contact a wildlife rescue organization.
Remember: It's crucial to treat all wildlife with respect and care, and avoid unnecessary intervention in their natural behaviors.