Originally Posted by KatheChow
I wonder if she is mentally unstable.
Wow! After an experience like that, I couldn't blame her if she was. I think *I* would have a difficult time hanging onto my own sanity if that happened to me.
One thing stood out for me, was that it seems you keep her litterbox in a high-traffic area. (main entrance) Many cats do not like being disturbed when they "go" because eliminating makes them vulnerable. ...but you've said you *have* moved her litterbox around and *too* the areas she was poo-ing.
Where are the places she is poo-ing?
Are they in the open? Does she need to be able to SEE any 'danger' approaching while she is eliminating?
Are they in hidden areas? Does she need to be hidden from 'perceived' danger while she is eliminating?
Can you give her two litterboxes? One with sand for the pee, and maybe one empty one for poo? Or try just a flat layer of newspaper? Or a small scrap of towel? (I had to do that for one of my cats, but it was because he couldn't stand and keep his balance in the shifting sand/litter
) Toss one nugget of poo in there, and show it to her, so she may get the idea *that* box is for poo?
I suppose I would also consider a short period of confining her to one room that has a window, sleeping area, food/water and two litterboxes, one with sand and one flat (either empty or with the flat layer of newspaper or towel
) and see if she will begin to use it. Visit her often and/or bring her out into the rest of the house for supervised play sessions, but when no one can keep an eye on her..."crate" her in her small room. I like bathrooms, because they are easy to clean and won't give her too many options for elimination.
I wish we had more to offer, best of luck,