I went from an open litterbox to one with a lid and clear plastic swinging door. Now Squeaky spends a fair amount of time in it facing the outside world. I think the door makes her feel like she's in a safe and secure hiding spot. I'm thinking of taking the door off to encourage her to spend more time elsewhere. She's 7 months old. Since this started with the new litterbox, I don't think it's a health issue, though might it become one? Any thoughts?