It sounds like the six year old may be "marking" trying to be dominant. She may feel "strange" due to the kidney problems and may feel that she's losing power over the other cat or whatever.



You might try spritzing a little Feliway on the mat after you've cleaned it and see if she'll leave it alone. Feliway is a very good deterrent for urine marking behavior. Just be careful not to get it into the box itself, or the other cat may avoid the box.
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Smile, it will make them wonder what you are up to!

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• Urinating just outside the litterbox - Hawthorne, Tue Apr 29 12:56:20 2003
• RE: Urinating just outside the litterbox - karlacue, Tue Apr 29 13:15:40 2003
• RE: Urinating just outside the litterbox - MunchieScrunchie, Tue Apr 29 20:13:27 2003
• RE: Urinating just outside the litterbox - PHCurious, Fri May 2 14:35:32 2003
• RE: Urinating just outside the litterbox - Hawthorne, Fri May 2 15:45:41 2003
• RE: Urinating just outside the litterbox - MunchieScrunchie, Sun May 4 13:22:57 2003
• RE: Urinating just outside the litterbox - Hawthorne, Mon May 5 05:39:19 2003
• RE: Urinating just outside the litterbox - pmantone, Tue May 6 18:26:51 2003
• RE: Urinating just outside the litterbox - PHMadameAlto, Tue May 6 18:46:12 2003
• RE: Urinating just outside the litterbox - JassyKat, Fri May 9 20:29:51 2003
• RE: Urinating just outside the litterbox - Hawthorne, Sat May 10 10:00:56 2003
• RE: Urinating just outside the litterbox - JassyKat, Sat May 10 21:27:03 2003
• RE: Urinating just outside the litterbox - PHMadameAlto, Sun May 11 15:55:16 2003