I think Lola senses ghosts in my house also. She has been waking up around the same time everynight to bark, growl, and whine furiously. Sometimes it's because the neighborhood cats come scavenging around my place for food and Lola hears the noises. Sometimes its nothing at all. She will be at the door, furious, very angry and intent, and not leave for 15 or so minutes! I tell her its ok, but other than pausing, it does her no good. I really don't know what to do, I'm sure the neighbors aren't exactly enjoying the midnight barking.