Tim wrote:
We have litter trays for our 2 cats,..one is a 5 yo desexed caramel
coloured short-hair male, the other is a little 7 mo non-spaide black
and white short hair female who we keep inside untill she is
neutered..
The male is fairly good, and uses the litter most times, but the
female usually takes a dump in the shower recess (like yucksville
:-))
We keep the litter clean of stools altho urine tends to soak thru to
the bottom. Having an extra tray didnt do much. Why is she doing
this? Is it something to do with the male leaving his smell in the
litter which is putting her off?\

We started using absorbant shale type litter, as the paper stuff is
too expensive. This occured when she was about 3 months. It didnt
seem to change anything. She took a long while to start using the
litter.
\
Thanx for any opinions, Tim

I would start by putting her litter box in the shower, or wherever she likes
to go. Once you've got her using it, then you can gradually move it to
wherever you want it. But, in case she doesn't like the other cat using it,
keep it away from him.