We have three cats in our household, and the oldest one is causing severe problems with her constant peeing outside the litterbox. Today she walked right by the box, looked at it and then turned and walked into a closet and peed under a dresser onto a hardwood floor. My wife is ready to take the cat to the vet and put it to sleep, and I don't know what to do. The cat is very old, and this problem has been going on for a while. She knows to use the box, it is cleaned regularly, the other two cats share it and another one, and she just seems to be thumbing her nose at us and peeing where she wishes. I know the carpet is ruined in one corner of the living room already from her constant peeing there. We've been sitting on the couch and all of a sudden hear the sound of her peeing in the corner, very brazenly. We've punished her and so forth, and there are times I do see her using the box, but this behavior has come to a point where either the cat stops it or the cat goes to the vet and doesn't come home. Please, any help/suggestions would be appreciated. The vet is being visited again this week./