Rodents such as mice, rats, squirrels, raccoons and opossums among the rodents that may try to infiltrate your home between October and February. Signs include scampering or gnawing sounds late at night in the attic or behind walls, and droppings found in undisturbed areas of the house (pantries, attics, garages, under baseboards, and along walls). These fuzzy creatures are destructive. They'll chew through packaged goods, cardboard boxes, walls near pipes and vents, and electrical wiring.

If you have a rodent problem, you're not alone. There are as many as 21 million households in the U.S. fight rodent infestations each year during the winter.
Common points of entry include pet doors, holes in walls, missing vent screens, openings around pipes and dryer duct vents even openings as small as a nickel or half dollar.
So what can you do to keep them out? B.A.G suggests sealing all holes of larger diameter than a pencil, sealing any cracks and voids, and making sure there's proper drainage at the foundation, including gutters or diverts which channel water away from your home.