You will hardly ever see a mouse. They are timid, nocturnal creatures. If it's crawling around your kitchen, it's doing it under the cover of night. And if it hears you coming, it is going to get out of dodge before you flip those lights on. For this reason, mice are a threat to many families. If you don't know they are in your home, you don't realize that they are contaminating your food supply and leaving a variety of bacteria and decay on your dishes. A wild mouse is not something you want in your home. It brings the rot from that dumpster down the street right into your silverware drawer.