Anonymous wrote:Rather than standard size litter boxes, buy a couple of those plastic storage tubs and use those for litter boxes. Obviously, you won't need the lids. My cat, also a big kitty, had been having trouble with the regular cat litter boxes until we started using the plastic storage tubs. I think I pay around $6 for one at Target. They are cheaper than regular cat litter boxes and work great.
Good ideas on the litter changes, too.
Also, talk to your vet. Might be something else going on.
My vet also recommended storage tubs as long as the sides aren't too tall. Another options is a small kiddie pool. And you may also have to retrain your cat to use the litter box. I agree with a vet exam to rule out any health issues.