Usually they like large litter boxes!!
Gail

My expert opinion is: try it and see! :) I do not imagine
she is decorator enough to note the color, but the height
of the larger pan, if greater than the smaller pan and especially
if she has a bit of arthritis, might bother her. Let us know what happens.

It's a good idea to try using a larger pan. We always buy the largest size
available. As for color, I don't think our cats really care or notice what
color the pan is, but then, they aren't picky about litter pans.They have never
even seemed to notice when we replace an old one with a new pan.

I think it's more important to put the new pan in the same place the old one
was. I expect she will have no hesitation using it--it might smell different
but you could put a little of the old litter into the new pan so that it smells
pretty much the same.

Ken Knecht <kenkknot@deruknot.com> wrote in rec.pets.cats.health+behav:

Cats are individuals, but I would say most don't mind.  Just let her
use the litter in the old pan and then dump it in the new.  She'll
think she's been there before.  I have Kami in a covered box for litter
flinging and I don't recall any fuss about the change  It's good we
have it because sometimes she's so close to the edge I would expect to
have the same issue as you.  She just barely steps in and then pees.  
Sometimes can hear it against the side.  She poos facing the other
direction--nose out the door.  Then she runs without burying.  Phew!

My cat had the same problem (peeing on the side) and also kicking the litter
outside the box.  I got a much larger box and it really helped.  She had no
problem at all adjusting to it.  I actually think she likes it.  Does pee on
one end and poop on the other.

paige