[Serenoa]

Having had numerous cats that lived to ripe old ages, I can say that most of them developed potty problems when they were older. There may not be anything you can really do about it. Sadly. I never found any of the keep-off sprays to work.

Is there a problem with multiple cats and are they all using the same litter box? I use what is really a large plastic blanket storage box instead of a traditional litter box. It is twice as big and has higher sides (my cat Cindy flings the litter around when she is covering up).

I also had a cat once that had started life as an outdoor cat and the only way she would use the litter box was when I finally put real sand and dirt in it (that was a pain, but it worked). I hauled alot of bags of potting soil and sand from Home Depot for years.