I have a cat (non-MC) that refuses to poo anywhere but next to the tray. My MC breeder said one of her girls do the exact same thing. No matter how many trays you put down get just goes next to them. Oh and none of my two cover ANYTHING. I'm hoping my 3rd cat (MC) has good litter manners. I can't wait until I've got my own house, with a cat run, with an outdoor toilet.