Thank you for your responses!! I've also wondered if it is possible that they are on the roof, but of course, I mostly hear the noise late at night. Perhaps I will go out with a bright light to see if I can see anything on the roof. Otherwise I'll give the rat poison a try. I just found someone who ...

Help! I've been hearing some sort of critters crawling, scratching, or dancing in the ceiling. Don't imagine there is much space up there, and there is no known access. What can I do? I bought those little electronic devices that are supposed to send waves through the electrical system that annoy pe...