Mouse hunt

My dog has discovered a possible mouse in our house. He's digging frantically in a corner (where he keeps his toys, so it's really more of a judgement on HIS housekeeping skills than mine) and sniffing intensely. He got a mouse out on the deck the other day. Fortunately, Minchy is all about the kill- he doesn't want to show us the bodies, or roll in it, or eat it. He's a true exterminator.
But in the meantime, he's driving us nuts with his focus.