The younger of our two cats, her name is mouse, learned fairly quickly how to open the doors in our apartment. We have the handicap friendly lever style doorknobs. To open them she will jump up and hang from the knob while simultaneously pushing against the door frame with her back feet. In this fashion she has been able to open all the doors except the front one because it opens the wrong direction for it to work for her. As you might imagine this behavior while rather impressive, can be a bit of a nuisance, if you shut the bathroom door and she wants in, which she always does, she will first try to jump up and open the door. If for some reason that doesn’t work she then starts trying to dig her way under at the crack between the door and the floor. we like to keep the bedrooms closed during the day in an effort to reduce the heating bill, Mouse does not like this idea, everytime we shut the door she is right there to open it and go into whatever room it goes to. Recently we discovered that if we hang a hat on the doorknob, she can’t hang there and get the door open. This has led to some rather entertaining behavior. Just this morning I watched the cat first try to hang on the covered doorknob, then she seemed to be trying to knock the hat off the handle, finally she tried sticking her little paws under the door and digging at the carpet, (hmmmm, i think that last one might be a problem). Anyway, the whole thing reminded me of the story that was shared in class about the kids and the christmas lights. Eventually, the cat gives up if the hat is hanging on the knob, and she finds something else to do, but as soon as the hat is gone she is right there to open the door again.