Our new friend--neutered male cat-- is a long-time stray--neighbors say he's been around for at least 2 yrs. We've been slowly getting him inside, and may make the full transition this weekend. What has been your experience with litter-box use? He remembers a little of being a housecat (he's very polite indoors, no scratching or spraying) but we don't know if he'll remember the litter-box.