None of them tended to be pee-ers at first, except one and she only struck laundry baskets. The peeing we've seen the most of began when we added Emily's cats to our own last fall. So I rather think it's a stress reaction more than anything else; this is a large house but still... ten indoor cats is too many! Not sure just removing two of them will be enough to ease the situation. Probably not. *sigh*
Some of the more imaginative peeing:
* Backed up to a full roll of paper towels in an upright, counter-top dispenser and soaked it.
* Got the outside of my most-used piece of luggage, but I managed to rescue that with about half a ton of baking soda--then panicked that airport security would panic at this bag still trailing unidentified white powder (they didn't).
* The checkbook for a non-profit organization I keep the books for; I ended up photocopying the affected check stubs and tossing the originals.
* Too many times to count, the throw rugs underneath the litter boxes. I don't even know how they manage to hit them, most of the time. Must take a special kind of squat-and-aim stance. But I finally clevered-up enough to get some puppy training pads and insert those between the throw rug and the floor. Does help in cleanup.
* The inside of my purse, mainly the credit card wallet. Nearly DIED when I opened the purse to pay for something and the smell wafted up! Needless to say, I now keep my purses in the closet--door always closed!--to foil any repeat performances.
* And of course the usual: Bedding, pillows, clothes (on the floor or anywhere else, they don't discriminate), floors, rugs, etc. So far, no good shoes....