We have two cats and had found that random bags have been weed on previously, but not seen the culprit until my girl cat did it almost right in front of me on my daughter's school bag. She wasn't long in from being outside and usually settled upstairs but Tonight did this.
For context she's a rescue, nervous and wary, lives in a house with another rescue who is dominant and who she doesn't really get on with at all as he's a twat.
I'm here all the time, two kids half the week and my partner around the other half (she loves him but his bag and shoes have come in for the wee treatment). White cushions have also suffered, and a leather bag of mine. Always down stairs.
She is allowed out during the day, does have a litter tray but can be quite fussy about it so will change the litter.
This is irregular, so I would think behavioural. Any advice?