Last night I dreamed I was home at my house in Maryland. My parents were there too and it was August. Something kept coming to our back door but we didn't know what it was. You could hear it in the back yard when it came - a sort of vibrating, humming noise, a little whiny. We would open the back door and nothing would be there.
My cat - an orange cat named Stanley who in real life is dead as of a couple months ago - was there, and he would walk up to the back door like a dog. He would back away from it and charge forward. To him the presence was right there even though we couldn't see it.