Jack and the Mouse

I woke up at 4:00 am to hear Mika running rampant downstairs and sliding across the floor in various rooms. I figured that she was chasing a mouse, so I went back to sleep. Sure enough, when I came downstiars in the morning, Mika presented me with the mouse at the bottom of the stairs. I went to fetch a shovel to remove it from the house, meanwhile Jack joined Mika, but failed to notice the mouse.