mice and how long do they breed for
Begin to breed mice at a relatively early age. 1  Females can breed from approximately 6 weeks old. 2  Males can breed from approximately 8 weeks old. 3  If time is not an issue, however, it is best to wait until the females are 12 weeks old, as this generally produces stronger litters.here are several reasons one would breed mice ranging from a desire to raise them as pets to breeding them as snake food. Whatever the reason for the breeding, there is a specific process for the most humane, safe and effective mouse breeding.