This morning and again just now at lunchtime I have heard about 30 seconds of the scrabbling of little claws overhead, above the bathroom ceiling -- followed by silence. The bathroom is on the ground floor and there is a second story above it. This is a 60+ year old suburban home on the east coast of the U.S. My guess is that a squirrel has broken in and is using my house as a warming room. (It is below freezing outside.) My question is this: What are the next steps I should take to investigate and solve this problem? Whom does one call in this situation (aside from a handy friend)?