The answer to 'how did rodent get in my house' is that rodents can enter your home through even the smallest of openings, such as cracks, holes, or gaps in the foundation, walls, or roofing. Rodents are excellent climbers and gnawers, and they are driven to find food, water, and shelter, which can lead them inside your home. Common signs of a rodent infestation include droppings, gnaw marks, nesting materials, and scratching or scurrying sounds.
To prevent rodents from getting inside, it's important to seal up any potential entry points, keep food stored in airtight containers, and remove sources of water and nesting materials. If you suspect a rodent infestation, it's best to call a professional pest control technician who can properly identify the problem and implement the most effective and humane solution.