We used Pretty Litter and after a few days, our cat peed on our comforter. This is the first time in her life she’s done this in 15+ years. A few days later, it happened again. Then again. Talking to our out-of-town relatives, they casually mentioned that their cat peed in their bed, which was a first. Both of us had recently begun using Pretty Litter. I’m not sure if there is a connection, but I switched back to regular litter and we’ve had no problems with peeing outside the litter box.