17 yo cat. I've been suspecting she's a bit demented but she has started pooing outside the litter tray including on the kitchen work top! Kitchen is open plan and no way of stopping her from getting up. There is nowhere else in the house she can be or she'd be happy. Can't have this though obviously it's disgusting! She seems ok make aside from this apart from staring into space, occasionally falling off the couch, seeming to forget she has been fed etc. What if anything can we do?