Mice in the house are quite funny

The was one in the house here too, and that too ate at the bird food stored in the spare room. I think it went to live outside (or there is another one) My dad blocked up the possible entrances into the house. A few weeks ago I became paranoid there was one in my room, thinking I could hear one moving around, but never found any evidence, and when on holidayI also thought I could hear noises but again no evidence, so idk if there ever was a mouse or not in either place lolol.