murphy@hou2a.UUCP (R.GANNS) (11/28/83)
I have heard that cats like to have their OWN litter box
and may not use one that another cat is using.
A cheap experiment would be to give your problem cat its
very own litter box, with some initial coaxing and/or confinement
to get him/her to use the box first, before the other cat gets
to it. Locate the new box far from the old(other cat's) box.
Rich Ganns
hou2a!murphy