I think we have a mouse in the house that came up the dryer vent. There's mouse turds near the roach traps in the kitchen and I checked that my gerbils are safely secure in their cage. I wouldn't mind except it's in the kitchen and has peed on almost all my pots and pans so I think it's a boy mouse marking everything. We've put down quick snap traps with peanut butter and I recommend he takes that option over being found by the three dogs and ripped apart or swallowed whole as a snack.