The house mouse is nocturnal; they do most of their feeding and exploring at night. If you are seeing active mice during the day, it is an indicator of a more serious problem than you initially thought.
Mice have very poor eyesight, but have a superior sense of hearing, smelling as well as taste. They can sense food from a considerable distance, and with their delicate sense of touch, they can quickly navigate through most areas to reach a food source.
When mice live in or around structures, they usually cause some degree of damage. In homes and commercial buildings, they may feed on various stored food items or pet foods, contaminating far more food than they eat. In addition, as they travel in search of food they will urinate on food, contaminating them with their droppings, and hair. This contamination to food products makes it unfit for resale to humans.
The food they contaminate is not the only problem. Mice can carry both disease organisms and parasites. Here are a few that they can bring into your home: salmonellosis (food poisoning), rickettsialpox, and lymphocytic choriomeningitis. They can also carry leptospirosis, ratbite fever, tapeworms, and organisms that can cause ringworm. This is another important reason you need to eliminate your mouse problem starting today!