You might try cleaning two or three times a day at first for a week or
two...she might not be comfortable with going in there when there's
something in the box, especially if it came from the other cat.

Also, make sure you are using "unscented" litter...that pong can be
really off-putting to small noses, even more so that some other cat's
leavings.  None of my ever-seven cats would touch it with a 10 foot
disinfected barge pole, the scented kind I mean.  And the more they
have to dig (as in for pooping) the worse that scent is brought out...I
can't stand it myself.

You might also want to try getting a second box, putting it elsewhere
in the house on a different floor and very visible in her room of
hanging out.  You can gradually move it elsewhere, but it might help if
it doesn't have the smell of the other cat if little one is
intimidated.

And yes, do keep putting her in the box, especially at these times:

1.  right after eating
2.  right after waking, at any time of day
3.  right before sleeping at night

I have an 8-wk-old black spot here beside me, with 13 yr. old host cat
(less hostile than five days ago)...and at night, I bring litter box in
guest room, close door, sleep there with baby...and the first place he
jumps for when he gets bored in the night...is the box which he can see
from the bed.  So far, so good.

Because yours is older, and has been out and about, you may have to be
a bit more persistent, for a few more weeks before she gets it.  Also
let her be around when the older cat goes....kittlings *do* learn by
example.

Let husband know that it might take a month or so to see if she will
learn it, so perhaps he won't assume the worst just because she hasn't
caught on yet.

good luck!
---tension

As an absolute last resort, I can tell you what worked with one
cat.....I put the box in the bathroom and whenever I went in there and
sat on the toilet, she came in with me and sat on hers.  Seriously!
And you couldn't fake her out either....I had to really go, or she just
disdainfully led the way out of the room!

put a litter box behind the entertainment center?  :)

seriously, sounds like you need at least 2 more litter boxes in
the house, and need to locate one where the kitten is more
comfortable using it.

good luck!

Hi,

This is not uncommon for a kitten this age that is used to being outside.
You are doing a good job, so far.  Good job also for remembering to check
for physical issues.

For the time being, I agree, put a litter box behind the entertainment
center or block access to it.  It will only be temporary.

Kittens will often not travel to another room in search of a litter box.
They will often think, "gotta go," and look around for the best nearby
place, especially if they are used to being outdoors.

There are 2 best ways to solve your problem, you choose which one suits your
household the best:

1) put a litter box in every room, conveniently located so that the cat
never has to go find one.  After about a month, start moving the boxes to
the room where your main box will ultimately live and then removing them.

2) Never let the cat be free in the house unsupervised.  Set up a kitten den
in the bathroom with litter box.  When you leave the house, stop watching
the cat, or go to bed, the kitten has to get locked in the bathroom with
litter box.  When you are watching the cat, lockup not needed.  This is kind
of a sad thing to do iwth only one kitten :-(  But it is very effective, so
if you object to temporarily having boxes in every room then it is the best
option #2!

Either way, you're only looking at a few weeks.  Cats are pretty easy, for
the most part.