I have 4 cats. Rocky for 6 years (Rocky was never an only child our oldest Boots died recently), Dudley and Lana for a year and a half, and Russell for 1/2 year. Just recently I've come home to find a stool and urine on my new white bed spread. I've washed it several times to make sure it came clean and did not have odor. I've tried to make sure my door was shut when I wasn't in my room. It's now happened at least 4 times, to different bed spreads and sheets. Most recently it happened while i was sleeping and woke up to find urine spots all over my bed. And I've even taken out the mattress and sprayed it down and aired it out. They've never done anything like this for no reason before. Their litterboxes are clean (they each have their own), they weren't locked in the room, they had food, they get plenty of attention. Does anyone have an idea on what prompted this? Any suggestions????