There's a "critter" of some sort under my house or in my wall. It's driving my dog crazy. I don't know if he can hear it or smell it, but he's barking and whining at the baseboard in the dining room. I heard a scratching sound one day last week. I think the unwelcome guest might be bigger than a mouse but I'm not sure. I've got a trap big enough for a raccoon or possum under my crawl space and I'm going to put this under there too in case the villian is of a smaller variety.