Mice and rats commonly seek protective shelter in homes, attics, basements, garages, barns, outbuildings, cabins, automobiles, boats and recreational vehicles. They are also active in commercial buildings, especially restaurants and storage facilities.
Rodents self-regulate their population, however, with access to shelter, food and water they can quickly multiply.
For example, a single pair of mice can be responsible for as many as 15,000 offspring in a single year. What’s more, rats in the U.S. alone now equal 50% of the human population.