Hello all: I think sometimes I worry myself too much over my cat, Mister Pookie-Bear. But this one's got me curious: I have found him sitting at the front door, just staring at it, or at least at the knob. He's an indoor cat, and never goes outside, but of course sees me going in and out of that door. I thought maybe it was a sign that he needed his litter tended to, but after completely changing the litterbox, he still stares at that door, sitting right in front of it as though someone is about to walk through. Anyone else see this kind of behavior? Can anyone sort this out? Thanks folks! 