Yes, ferrets mark their territory. I can't say, of course, if that is what yours is doing, but my gibs are always dribbling urine or scent marking (or whatever it is they do) to show all the other boys what they're going to encounter if they should have the nerve to come out at the same time. It is the same spots, and they always head there first thing when they are let out of their cage. [Posted in FML issue 4141]