If you’re experiencing a problem with mice now, just wait until there’s a time that regular sanitation services aren’t available. The mild winter, flooding, and record heat have created a perfect storm for the mouse population. If you see signs of one in your home, there’s at least 34 others…for about 3 weeks anyway, in which time another litter of 4 to 6 are bred and the female then immediately begins gestation again. Though the average lifespan of a mouse is 18 months, in that time they can produce 60-80 mice.