First Time For Everything

See, I don't know how they're getting in.  I suspect it was when we had all the siding off the back of the house last month, but I don't know for sure.  We killed two of them, several days apart, about two weeks ago.  We killed one sunday night -- actually heard the trap snap on him and his little last attempts at escape before he crossed over.  I pray that's the last of them, but can you really ever be sure?  It's a really unsettling feeling, the idea that there's another being in your house and you didn't know and you don't know if he has a family.  I'm not the least bit sentimental.  It's my house and you're not invited.  Ya' vermin.