Hi Theresa,
I'm sorry you're having problems with Chica using the litter box. I'm not an expert in this area, but I'm sure others can weigh in.
I definitely wouldn't scold her though. She's not doing it to be naughty, but rather is trying to tell you something. Some questions come to mind though:
- is she an only cat? Some cats will poo outside the litterbox to show dominance (it's called middening)
- what kind of litter do you use? Have you tried different types of litter? Some cats find the wood pellets too uncomfortable on their feet and prefer soft grainy sand.
- what kind of litter box do you use? Have you tried covered vs. not covered? Since she's a big girl, is the litter box big enough for her to turn around in? Some owners use a large plastic storage bin, cutting out an opening at one end and finding it a better alternative.
- is she pooing in the same place? If so, what are you using to clean up after her? Most experts recommend using an enzymatic cleaner so they can't smell it any longer, followed by rubbing alcohol or alcohol spirit (to help cats stay away from the spot).
- have you tried putting down tin foil in areas she poos in? Again, some people find their cats will stay far away from tin foil and break the habit.
- you mention that Chica is 20 lbs. Is she just a big Raggie, or is she overweight? Does she need a bit of exercise and interaction with you and your husband?
- have you consulted a cat behaviorist? Many vets will work with behaviorists, especially when there's nothing medical going on.
If you're interested, there's a cat behaviorist from the UK named Vicky Halls. She's written a number of books and has a web site:
http://www.vickyhalls.net/. There's also a web site called FAB Cats, and they have some good advice. This page covers both spraying and soiling:
http://www.fabcats.org/behaviour/spraying/info.html
I'm sure others will have advice too. Hopefully you can get it sorted out soon!
Coral