Where you don't want your cat to pee put something citrus there - citronella, orange peel etc. They apparently hate the smell! It doesn't mask their urine smell though so you have to keep the citrus up until you have managed to remove the urine smell.

Apart from the crystal litter thing (I have heard this is quite common) cats that suddenly change habitual behaviour usually have either got a medical condition that you may not be aware of, are reacting to a change in their house or it is a power play with you.

If it is a power play thing, you have to nip it in the bud or put up with it forever, plus lose the respect of your cat. Some people end up having to give their cats away if this happens because they can't regain that respect. Sometimes this comes from a change in the household too, so if anyone has come or gone from your household, or you have moved their sleeping or eating places this may be contributing. Just one of those cat things!!

If it is a medical condition, it could be anything from a UTI to cancer. Cats have this very naughty habit of hiding symptoms, especially if they are very close to the owner. One of my cats did this, when I finally realised something was wrong, I took her to the vet only to be told she had bowel cancer and she only had a few days left. I was so devastated, and even now I look back and still can't recall any symptoms that would have prompted me to go the vets earlier. So if you can't think of anything that may have upset your cat, then it may be worth just getting the vet to check her out just in case.

Good luck!

Sarebear - how did you get your cat to do that? Did you have one of those potty trainer trays that go in the toilet?