The answer to 'how did rat get in my house' is that rats can enter homes through a variety of ways, including small openings, cracks, and holes in the foundation, walls, or roofing. Rats are excellent climbers and can squeeze through spaces as small as a quarter. They are often attracted to homes that provide easy access to food, water, and shelter.
Some common signs that rats have entered your home include droppings, gnaw marks, nests, and strange noises like scratching or scurrying in the walls or attic. If you suspect a rat infestation, it's important to act quickly to identify and seal any entry points, remove food sources, and consider professional pest control services if the problem persists.