Rodent entry points, or any method of which a rodent can enter a structure can cause great distress to your family. Rats = a quarter sized hole while mice = a dime sized hole.
I think this hole above is obvious, but think of all the places that might be smaller and easily accessible. Rodent entry points may include weep screen, pipes that go into wall, a/c penetrations, loose or no screens, under doors or garage doors. Sheds are also an easy target for all kinds or pests. That monthly inspection of your home is essential to a cozy living space with pests. Pick up fruit that has fallen, don’t clutter your yard or house. Don’t make it easy on those critters.