I had 4 cats and a mouse in the kitchen cabinets. We had a big U shaped kitchen, and the mouse was out in the end cabinets, I found mouse poop and chewed stuff in a drawer. I didn't find evidence anywhere else, and the vent from the Jenn Air stove (coming up from below) was the only place I could figure the mouse was getting in.

I opened up all the cabinet doors one night, and went to bed. The next morning, there was a dead mouse on the floor, and I didn't have any more problems.

The cats couldn't get into the cabinets to get it at first, that's why they couldn't catch it.